Hmm. The reason I don't currently have an "Are you sure?" dialog is because it seemed to me like the kind of thing that would only be valuable the first time you try clicking "remove" to see what happens, and every time after that it would be an annoyance. I could maybe try it with one of those "Don't show this again" checkboxes, but it sounds like this is more about a mis-click and less about experimenting with the UI and being surprised by the result. Another idea would be to add a "Confirm Removal?" option to the /preferences page, set it to false by default, and then you could switch it on if that's what you like. Thoughts?