The stealthy way some folks can do damage to the atmosphere in a thread that involves some disagreement is to repeat, repeat, repeat their point without giving an inch, never agreeing to disagree, and never simply letting it go. They repeat their point endlessly in order to shut objectors down, as if the last one posting is the one who "wins" the argument. This was common during the PMTS vs The World days at Epic. It also happened afterwards, but not as relentlessly.
That tactic sometimes slips past moderators since there's no specific rule against repeating your point. The repeater gets free rein to continue, and those posts can eventually drive those of differing opinion into a state of rage. This is how a stealthy repeater can lead good people to lose their cool. The train wreck will have been going on for a long time with no personal attacks and no offensive language, but when a good guy finally goes ballistic, moderators may think they have no choice but to finally act against the good guy, when it's their fault this happened in the first place.
I haven't seen this happen here yet. Hope it doesn't.