Well, feeding trolls/ trying to have the last word in a no-win debate is obviously something that will degrade a forum...
Appealing to reason, asking for it to stop, or not saying anything while the admins do their job is an obvious improvement...
So I don't seem I'm coming with more problems than solutions, I have a third recommendation:
What about just "changing the subject"?
That's right, rather than letting the whole forum go to pot, just sitting there simply "waiting for the other shoe to drop", why not weigh in on any OTHER positive topic of your choice?
Sifu Pavel Macek has gone to no small trouble to revamp this forum into something that everybody can enjoy, but nobody sensible is going to like a forum if the first topic that they click on is going to be some "spitwad-and-peashooter" affair, am I not correct?
Seriously. Next time you see a topic that you do not like, just change the subject. Pick any three threads to briefly comment on, and just bury that offending topic deep. After a while, both trolls and admins will get the message, we'll all be back on track with interesting presentations/ meaningful debates, and this will continue to be a forum worth looking forward to!
Best,
Michael
PS: For an excellent example of "interesting" and "meaningful", I recommend taking a look at the articles Sifu Macek has written and posted, right here on the home page of your very own
Naamkyun forum!