diff --git a/app/controllers/collections_controller.rb b/app/controllers/collections_controller.rb
index 285ca6964..2bc7fa08d 100644
--- a/app/controllers/collections_controller.rb
+++ b/app/controllers/collections_controller.rb
@@ -20,8 +20,11 @@ class CollectionsController < ApplicationController
   def update
     @collection.update! collection_params
     @collection.accesses.revise granted: grantees, revoked: revokees if grantees_changed?
-
-    redirect_to edit_collection_path(@collection), notice: "Saved"
+    if @collection.accessible_to?(Current.user)
+      redirect_to edit_collection_path(@collection), notice: "Saved"
+    else
+      redirect_to root_path, notice: "Saved (you were removed from the collection)"
+    end
   end
 
   def destroy
diff --git a/app/javascript/controllers/collections_form_controller.js b/app/javascript/controllers/collections_form_controller.js
new file mode 100644
index 000000000..2ee872b4c
--- /dev/null
+++ b/app/javascript/controllers/collections_form_controller.js
@@ -0,0 +1,21 @@
+import { Controller } from "@hotwired/stimulus"
+import { nextEventLoopTick } from "helpers/timing_helpers";
+
+export default class extends Controller {
+  static targets = ["meCheckbox"]
+  static values = { selfRemovalPromptMessage: { type: String, default: "Are you sure?" } }
+
+  async submitWithWarning(event) {
+    if (this.hasMeCheckboxTarget && !this.meCheckboxTarget.checked && !this.confirmed) {
+      event.detail.formSubmission.stop()
+
+      const message = this.selfRemovalPromptMessageValue
+
+      if (confirm(message)) {
+        await nextEventLoopTick()
+        this.confirmed = true
+        this.element.requestSubmit()
+      }
+    }
+  }
+}
diff --git a/app/javascript/controllers/toggle_class_controller.js b/app/javascript/controllers/toggle_class_controller.js
index ca29ad771..039ad2e65 100644
--- a/app/javascript/controllers/toggle_class_controller.js
+++ b/app/javascript/controllers/toggle_class_controller.js
@@ -2,6 +2,7 @@ import { Controller } from "@hotwired/stimulus"
 
 export default class extends Controller {
   static classes = [ "toggle" ]
+  static targets = [ "checkbox" ]
 
   toggle() {
     this.element.classList.toggle(this.toggleClass)
@@ -14,4 +15,16 @@ export default class extends Controller {
   remove() {
     this.element.classList.remove(this.toggleClass)
   }
+
+  checkAll() {
+    this.checkboxTargets.forEach(checkbox => {
+      checkbox.checked = true
+    })
+  }
+
+  checkNone() {
+    this.checkboxTargets.forEach(checkbox => {
+      checkbox.checked = false
+    })
+  }
 }
diff --git a/app/views/collections/_access_toggle.erb b/app/views/collections/_access_toggle.erb
index 579cb4fc1..9940d6b14 100644
--- a/app/views/collections/_access_toggle.erb
+++ b/app/views/collections/_access_toggle.erb
@@ -9,7 +9,9 @@
   <%= icon_tag "check", class: "toggler__visible-when-on margin-inline-end" %>
 
   <label class="switch toggler__visible-when-off flex-item-no-shrink">
-    <%= check_box_tag "user_ids[]", user.id, selected, class: "switch__input", id: nil %>
+    <% checkbox_data = { toggle_class_target: "checkbox" } %>
+    <% checkbox_data[:collections_form_target] = "meCheckbox" if user == Current.user %>
+    <%= check_box_tag "user_ids[]", user.id, selected, class: "switch__input", id: nil, data: checkbox_data %>
     <span class="switch__btn round"></span>
     <span class="for-screen-reader">Give <%= user.name %> access</span>
   </label>
diff --git a/app/views/collections/edit.html.erb b/app/views/collections/edit.html.erb
index 1b95d3f27..55a7d53e7 100644
--- a/app/views/collections/edit.html.erb
+++ b/app/views/collections/edit.html.erb
@@ -21,7 +21,10 @@
       <div>Choose who can access this Collection</div>
     </header>
 
-    <%= form_with model: @collection, class: "display-contents", data: { controller: "form" } do |form| %>
+    <%= form_with model: @collection, class: "display-contents", data: {
+          controller: "form collections-form",
+          collections_form_self_removal_prompt_message_value: "Are you sure you want to remove yourself from this collection? You won’t be able to get back in unless someone invites you.",
+          action: "turbo:submit-start->collections-form#submitWithWarning" } do |form| %>
       <%= render "collections/edit/name", form: form %>
       <%= render "collections/edit/users", collection: @collection, selected_users: @selected_users, unselected_users: @unselected_users, form: form %>
 
diff --git a/app/views/collections/edit/_users.html.erb b/app/views/collections/edit/_users.html.erb
index 884bfc9fe..a9eda26be 100644
--- a/app/views/collections/edit/_users.html.erb
+++ b/app/views/collections/edit/_users.html.erb
@@ -20,6 +20,14 @@
 
   <input placeholder="Filter…" class="input input--transparent full-width" type="search" autocorrect="off" autocomplete="off" data-1p-ignore="true" data-filter-target="input" data-action="input->filter#filter">
 
+  <div class="toggler__visible-when-off">
+    <div class="flex align-center justify-end gap-half">
+      <button type="button" class="btn btn--plain txt-x-small txt-link font-weight-normal" data-action="click->toggle-class#checkAll">Select all</button>
+      <span class="txt-subtle">&middot;</span>
+      <button type="button" class="btn btn--plain txt-x-small txt-link font-weight-normal" data-action="click->toggle-class#checkNone">Select none</button>
+    </div>
+  </div>
+
   <ul class="settings__user-list" data-filter-target="list">
     <%= access_toggles_for selected_users, selected: true %>
     <%= access_toggles_for unselected_users, selected: false %>
diff --git a/test/controllers/collections_controller_test.rb b/test/controllers/collections_controller_test.rb
index 870f5dec5..b6be6b2c8 100644
--- a/test/controllers/collections_controller_test.rb
+++ b/test/controllers/collections_controller_test.rb
@@ -34,17 +34,29 @@ class CollectionsControllerTest < ActionDispatch::IntegrationTest
         auto_close_period: 1.day,
         auto_reconsider_period: 2.days
       },
-      user_ids: users(:david, :jz).pluck(:id)
+      user_ids: users(:kevin, :jz).pluck(:id)
     }
 
     assert_redirected_to edit_collection_path(collections(:writebook))
     assert_equal "Writebook bugs", collections(:writebook).reload.name
-    assert_equal users(:david, :jz).sort, collections(:writebook).users.sort
+    assert_equal users(:kevin, :jz).sort, collections(:writebook).users.sort
     assert_equal 1.day, entropy_configurations(:writebook_collection).auto_close_period
     assert_equal 2.days, entropy_configurations(:writebook_collection).auto_reconsider_period
     assert_not collections(:writebook).all_access?
   end
 
+  test "update redirects to root when user removes themselves from collection" do
+    collection = collections(:writebook)
+
+    patch collection_path(collection), params: {
+      collection: { name: "Updated name", all_access: false },
+      user_ids: users(:david, :jz).pluck(:id)
+    }
+
+    assert_redirected_to root_path
+    assert_not collection.reload.users.include?(users(:kevin))
+  end
+
   test "update collection with granular permissions, submitting no user ids" do
     assert_not collections(:private).all_access?