I don't really see the need to limit talk of politics (definitely gun related) or religion ( to each his own, just be respectful) anywhere. But, in someones else house, I try to follow the rules. The problem at some other sites, including THAT one, is that justice is anything but equally applied and when $$$ starts becoming an issue of import, things get even worse. One site I frequent the owners make no bones about the income stream. They discuss almost everything and it can get...spirited. They discussed changing things some time back and decided to leave well enough alone. But again, that's someone elses house, so to speak.
I'll tell you what has caused me to leave several sites- sex. If I have to switch screens when my wife or kids are nearby, it's not the place for me to be. Back when I was modding at another site one of the members wives joined and decided to start posting racy pics of herself. Not porn, but way too much flesh and suggestive content. Boys being boys, unpleasant, unwise things were said. She continued posting the pics. I tried diplomatically pointing out that sooner or later someone would cross the lines of good taste and humor to no avail. Finally just told her to stop- period. I still can't fathom what she was thinking. Trying to fill a need the ego demanded?