I believe we've got a feature request open for an (optional, of course) "are you sure you want to delete X" step. I think we also have a feature request open for something along the lines of the Trash, if that would be preferable. Delete would just move something to a special list in your database that was kept separate from your active tasks. Maybe that would be preferable?
Either way, if you'd like something along those lines, email our
support ninjas and they can attach your email to that item in the development database. Thanks!