If you imagine every Texags forum being a prison, the idea of this community is basically that of a panopticon: The prisoner (or posters) aren't sure when or who is watching them so good behavior is encouraged at all times. Seems legit, right? You don't know when or where the mod will be on so you are incentived to be a decent community member or you risk a ban.
https://en.wikipedia.org/wiki/PanopticonThis model completely doesn't work when you have no uniform rules and one mod goes easier in one forum and lets posters use ethnic/social slurs and sexist content freely while you have another mod in another forum who bans and deletes content at his/her discretion.
This site is a private business and the owners can make up what rules they want, but clearly something in the moderation is not working and has been a gripe in this community for years.