rotten, orsm etc were core to my growing up and exploring the internet.
glad i got it out of my system, glad i grew up in a time when it wasnt normalized. I never graduated to 4chan, it all seemed too nasty and pointless to me
SA is another one i remember now you mention it tho. getting a crash course in the nastiness of what was out there really helped me realize what my empathy base should be. It's probably why i never got into 4chan at all.