No matter what is on the "banned" list, someone will flirt with the limits. It's human nature. It might not be your nature, but it is someone's. That being said, during a time when everything has gone to hell, sometimes you just need to get it off your chest where you feel the safest. Sometimes that place is in a land of pixels with people you have interacted with for months or years. Now if a pleasant discussion devolves into a heated mess, by all means, we should do something about that - no matter what the topic is.
Bottom line, I think the real issue comes down to no set moderation rules. We've been guided by the moderators' interpretation a lot more than a hard and fast rule. With the influx of new players, there seems to be a knee-jerk reaction to anything remotely controversial. I'm all for less trolling, but taking the fun/silliness away seems more harmful to me than anything else.