Regina, Saskatchewan; Canada
I think this covers a lot of it:
That was posted in the Philosophy forum, but I don't see why it shouldn't stand in this forum as well.
Another bad manner is trying to trash someone else's opinion or calling it an insolent name, which at least is not personal, but it is still no good manner and often provokes spiteful "shots" back and forth. True, we can criticize people's opinions and complain, but I think we ought to be expected to show some level of respect and tolerance for other people's opinions. And I am not saying that necessarily should be a "rule", but rather an expectation that the moderators can help uphold and encourage.