Yeah, I had to make a decision on that one.
Since people are able to reply to posts there, then giving a person the power to delete the entire thread also gives them to delete another person's posts.
There have been situations I have seen, where I would rather not allow people to be able to do that.
I will just have to go through periodically and prune out old messages myself. I thought I had it set up this way for quite a while now, but now I'm not sure.
I had to redo all of the permissions for this move, so it is quite possible somethings might not be as they were before. Proabably by accident, and not intent, however.
Thanks.