When a thread gets deleted, any posts that you have made on that thread disappear. Same with any reps you may have gotten on that thread. You still retain the points, but lose the rep comment. I've learned to not post on threads by trolls that I know will get deleted.. lol
I've also noticed that 1 or 2 certain people keep gaining powers in leaps and bounds. Like, in one day, they gain 3 or 4 powers and just keep gaining..