Other memorable fads:
The Fatening- everyone changed their avatar/descriptions to look exactly like feemail veteran Fate , confusion ensues. Goddang DA you had like a monopoly on fad production or something
Junior Senior's blog- almost exclusively about her farts/period. I guess this doesn't really count as a fad considering only one or two people participated in it but it went long enough that it became on of the accepted sideshows on the site
Trolling Wireforums - Some vgchat vets- mainly Klarth/fnool- had a mildly serious grudge against another web forum that had a convoluted relationship between it and vgchat. The occasional "why wireforums sucks" discussion became a routine occurance in the early/mid 2000s
Also the chat had plenty of good ones, but I want to link to them properly when Jesse gets the rest of the archive set up. Two that come to mind:
BLVD/Spam Nation - The most dedicated group of psychotic spammers in vgchat history. Created several forums dedicated exclusively to harassing us and their drama eventually spilled over to the boards
Raymond quotes- The "JackWriter" of the chats, he tended to make a lot of people mad and not understand why. Quoting the legendary Raymond is still generally considered funny in any context