Comment Re:bit of a tricky question with forums (Score 2) 171
Many discussion forums I've been a part of allow deleting your own posts. Some even allow editing. That they don't give you a mechanism to blindly mass-delete posts wouldn't change your ownership rights over them.
For that matter, "ownership" rights may simply mean that you retain copyright over the posts. This doesn't mean you get to somehow magically make them all vanish on a whim -- no more than an author can go out and change or magically vanish copies of books already in other people's possession.