If you are going to moderate, make a list of rules. Make the rules clear lines that everyone can understand. Then enforce them. Harshly.
There is a very real schism in the way certain people say something and can get away with it, and then someone else says the /same thing/ and they do not get away with it.
The rules need to be applied equally.
They need to come down on everyone equally.
Otherwise... it's the same old meaningless circle jerk where some people can get away with saying anything, and other people cannot say anything without being attacked and railed on.
If you half-ass this moderation thing (Which is what it seems like right now honestly) it's not going to make /anyone/ happy.
On the other topic of the hog pit, if you remove the hog pit you're going to have an even tougher time to moderate things because there won't be anywhere that people can just... vent.
Venting is how some people move through stuff and move on. Without that outlet it's just going to make the explosions when they happen elsewhere be all the more messy.
It /would/ be nice if everyone could just get along and sing campfire songs and be completely nice to each other but at this point opinions are so ingrained in some cases that even perfectly reasonable statements get someone's back up and there is a pissing contest or a cat fight or a dog pile.
In a lot of ways, this Forum is best equated to the power of the Mob Mentality. In a Mob, people have anonymity, we have that same anonymity.
Everyone knows what Anonymity does by this point really, it removes filters and people behave without restraint.