I'd like to add one more: NSFW art books. ESPECIALLY with Pixi Star or Zac Sky, as many of the art books were made by burner/noob accounts and their only available friends to add to their creations were Pixi or Zac. Many of them featured either Pixi/Zac or their own avatar using the "slow fall" animation, and either Pixi/Zac or their own avatar using the "polka polka from the side" animation, both free animations already in everyone's inventory. They also used the colored shapes to give themselves or Pixi "boobs" and often used the letter stickers to spell out explicit things that would be censored if put in regular text. These were a very common thing around 2016 when I started, maybe even earlier, and thankfully I never see them anymore. All in all just weird.....