There was a huge one on Lemmy.World, which was probably the 2nd most active community on lemmy, next to this one.

Lemmy.world has been the target of lots of attacks in general since Lemmy got popular, and the latest one was targeting that specific community with CSAM spam. After dealing with the attacks, the admins shut down the targeted community out of caution and haven’t reopened yet. I don’t blame them for being extra safe, but it sucks that we don’t have a good shitposting community now.