Before anything else, I would like to say that i dont expect this to happen, because it is a bit of a strech.
I think it would be helpful if the creators of threads were able to delete posts that were spam, rants, threats, or other unwanted posts.
I speak from experience when i say that it would help. Awhile back, i had some private information about me posted on one of my role-play threads. I did contact mods, but it took around two or more days to get help, all the while some personal stuff was sitting out in the open and i could do nothing about it. (i dont blame the mods, it was dealt with very well when they found out).
In the role-play section especially, if God-modders or mary-sues get mad if there haracter is not excepted, they tend to rant. spam is not so much trouble, but every so often people (mostly newbies) double, triple, (and up)click the "send" button not realizing that it is just being slow.
I do know, however, this could cause trouble if people abused it and that this sort of thing is mostly for mods, this is just an idea, though i would enjoy feedback.