Is it just me or does it seem his forums changed and he didn't notice it?
This isn't a boiled frog, what you're seeing here is classic "First they came for the Jews...then they came for me" willful apathy. He noticed, he just didn't care enough to fix the problem. It was easier to let his unpaid catlady volunteers be petty tyrants than set actual guidelines and decide that disagreeing with a mod's opinion (or the opinions of a mod's toadies) isn't grounds for punishment.
10 years ago, he could have just made a wacky zany "they haven't broken any rules, just like you're a faggot but I still let you post i'm using faggot ironically so it ok" post, then step back and let the funny posters dogpile and school these pearl-clutchers, while within 24 hours Helldump would discover the ringleaders are into furry vore and had criminally molested a dog. But now that he's driven off the funny posters, and all that's left is furries & troons - and the venn diagram on that is pretty much a single circle. There are no funny people to back him up anymore, he banned them all, only the unfunny outraged-at-everything remain.
His "you people chose suprise sex" ignores two key points. One, it was chosen when SA was not just a tranny outrage closet. And two, it was chosen almost 20 years ago, so it wasn't chosen by the community he's got now. Most of the current posters probably couldn't read when that was chosen. He banned or driven everyone who was actually posting at that time. Look at the reg dates on all the posters. He can't blame "you picked it" because none of them were around when it was picked.
e: Just say it you spineless pillhead. Just say its funny, you find it funny, its stupid shock value humor but its funny, you aren't changing it to appease some whiners, and if someone doesn't think its funny they need to think long and hard about if they really should be posting on a forum called something awful.
So now his forum is now a bunch of old church ladies, except because

the bible is a work of fiction for bigots

they don't even have the need to maintain a pretense of civility or morality in word or action.
tl;dr
Fuck Lowtax. He let his place get taken over by these dumbasses and now it's too late to change without destroying his minimal income that keeps him away from a 9-5. He's stuck and it's all his fault.