I added another line:
There are few people who can argue with themselves for days or weeks on end -- they have to have someone to fight with. And again, if I saw someone bumping their own thread with fluff/nonsense just to keep it at the top, and no one was taking the bait, I might consider that spamming and deal with that member individually (yes, I'm talking about banning).
But the people complaining the most are major participants in the threads in question, as far as I can tell! I'm sorry, but actions speak louder than words. If you participate actively in a thread, then YOU LIKE IT, period. Some people "enjoy" controversy, fighting, debate, and adversarial discussion.