Forbid user destruction

app/models/user.rb

@@ -90,6 +90,10 @@ class User < ApplicationRecord
 
   after_save :remove_invalid_unconfirmed_emails
 
+  before_destroy do
+    raise "Never destroy users!"
+  end
+
   def self.all_sharing_with_person(person)
     User.joins(:contacts).where(:contacts => {:person_id => person.id})
   end

spec/controllers/posts_controller_spec.rb

@@ -29,7 +29,7 @@ describe PostsController, type: :controller do
           msg = alice.post(:status_message, text: "Mention @{User ; #{user.diaspora_handle}}", public: true)
 
           expect(msg.mentioned_people.count).to eq(1)
-          user.destroy
+          user.close_account!
 
           get :show, params: {id: msg.id}
           expect(response).to be_success

spec/models/user_spec.rb

@@ -565,16 +565,11 @@ describe User, :type => :model do
     end
   end
 
-  describe 'account deletion' do
-    describe '#destroy' do
-      it 'removes all service connections' do
-        Services::Facebook.create(:access_token => 'what', :user_id => alice.id)
-        expect {
-          alice.destroy
-        }.to change {
-          alice.services.count
-        }.by(-1)
-      end
+  describe "#destroy" do
+    it "raises error" do
+      expect {
+        alice.destroy
+      }.to raise_error "Never destroy users!"
     end
   end