As I read through these, one thing that I've realized is that there have been only rare few times something in the game has been an issue--whether my homegame, in organized play, or a convention event. Almost every instance of arguments, offense taken, and hurt feelings that I can think of were do to side talk or discussions during breaking, before, or after the game. Further, they were all situations that could have come up at a BBQ, party, during a classroom discussion or just about any social setting with a mix of people. The last elections in the US were particularly tough in this regard. I have two friends who I avoided gaming with at the same time for a while because I didn't want my fantasy-fun time derailed by 90 minutes of political argument. It wasn't even a pro and anti Trump thing. Things have gotten so polarized that people on roughly the same side of many arguments will argue with each other because one feels they don't support a particular issue strongly enough. There is no room for moderates and those with even slightly different view points are villanized.
This is a much harder issue to deal with than disturbing in-game scenes.