OP is talking about the mod @frenchfryenjoyer@lemmings.world. She simultaneously banned a few accounts from her communities and I won't say I can blame her for not wanting to put up with a Kiwifarms troll with genocide denial and Nazi apologia in their post history. https://lemmy.world/modlog?page=1&actionType=All&modId=15038788

Leni/shinigamiookamiryuu and their alts (one of which, Jedikkeneus, is only 7 days old) tried to bait Frenchfryenjoyer into engaging with their community. I messaged her about this and she said she's going to not take the bait.

OP's question was asked very shortly after Frenchfryenjoyer banned them and their alts from her communities. OP might be another alt of Call Me Leni. The modlog looks suspicious. Modlog for OP's account

Now, yet another one of Leni's alts "PatrickStar" is requesting that another alt appoint them as a mod. https://lemm.ee/post/67572940/21488244

Your reputation precedes you.

Nothing changed, it was always possible, there might not have been the tooling, but it was always possible through the api.

its called cross-banning. reddit does this when problematic conservative subreddits have potential spammers and voters. but it also unilaterally bans innoncent users, which puts them in a vulnerable poisiton to be sitewide banned.