As for non-anthropology forums, it was AA Roads, Topix, & CityData.
When I was 13, I was on this highway-related forum known as AA Roads, & I basically this idea of building an interstate highway from New York City to my city, & many of the forum members literally laughed at me & started mocking my idea, around that time, I ran a tiny Micronation in my bed known as "Alanland", & I mentioned this to some of the members, & I was permanently banned from there, & even to this day, 10 years later, they are still making Alanland threads, it literally became a huge meme on that forum.
Another one was Topix, it was full of racist trolls, they literally talked about" killing all mexicans", they hated many races on there, especially Mexicans & Middle Easterners, there was even a thread where a supposed local KKK chapter from the area I'm from was going to burn a cross at the beach, I think that forum was filled by mentally disturbed people living in their parents basement.
Another one was CityData, I shared some of my ideas of urban planning there, & I think I lost my patience with some of the members there, & I was also permanently banned from there, this was also around 10 years ago.
As for anthropology forums, It was a few like Anthrogenica & the Apricity.
Anthrogenica is a very race denialist forum, its a very Boasian forum, they don't allowed classifications there, & I posted some racial theories there in the past, & they closed the thread & called my theories "stuck in the 1920s" that forum sucks & clearly they have an agenda there.
TheApricity used to be good, but Loki banned so many good members from there, it was originally open only to Whites, but Loki started to let other races join a few years later, they rely a lot on advertisements, I once saw this really distrubting ad of a photo of Einstein (with the tongue) photoshopped with a pill on the tongue, I saw this ad like at 4am, It was like a illegal drug ad, I'm surprised DEA didn't investigate that, it also many stupid members like Grab the Gauge who once made a very stupid thread saying that Black Americans are whiter than Mexicans, also Dick is another stupid member who makes retarded & pointless comments on there, just some Canadian loser who probably never had a girlfriend, I also heard that Loki spends the forum money for coke & prostitutes, he's a just a greedy Afrikaner, that's all I gotta say for TA, it's a forum that has gone downhill the past few years, might not be around 5 or 10 years from now, plus, the forum crashed so many times, there were some amateur anthropologists there like myself there, but a lot of us were banned from there, I was permanently banned from TA in December 2021 after letting some of my friends post there under my account.
Another one is AnthroScape, it was owned by RacialReality, who also had a blog & website, & was moderated by Crimson Guard, both were amateur anthropologists for a long time, but there's been rumors that they were the same person, CrimsonGuard was very obsessed with Coons works, & banned anybody who he didn't agree with, I was banned there by Racial Reality in December 2015, for posting some weird stuff on there, than I came back on there, & I made a thread where I stated that some Mexican Mestizos can pass for Iraqis, & CrimsonGuard got offended by my post & called me "insane", & banned me, then a few years later, after moving out of my parents house, I was able to rejoin AS, & I was there until the forum finally shut down, the forums provider was bought by a different company & many banned members returned to the forum to troll, & one dude called me a "spic" & told me to kill myself & posted a very disturbing photo of a dead person with a cross & blood, finally RacialReality decided that his forum wasn't the same anymore, & he decided to shut down the forum, & I assume that him & CrimsonGuard retired from anthropology, I wonder what they been doing in their lives now.
Another forum was ForumBioDiversity, the owner, Elias, was this Assyrian dude, & he had a huge attitude, he banned me from there, then after 6 months, I emailed him saying that I wanted a second chance & that I would behave better, so he unbanned me from there, I mainly posted only about Anthropology, & Elias messaged me & told me to "stop spamming the anthropology section" & to post on other sections as well, so I stopped posting on there, & the forum shut down around the same time as AnthroScape did.