Honestly you just gotta block the few AI communities and the occasional user.
I rarely block whole instances, but block communities with little hesitation.
At this point, the only AI stuff I see often has tons down votes or is just from a new community I can easily block.
They only linked to 3 "based memes," one of which was deleted by mods for promoting vandalism (how ironic coming from Reddit).
Prism is awesome because no ads and you can create a desktop icon to directly launch a mod pack
Best option: Grow old with friends!
Worse option: Develop schizophrenia and never be lonely again!
Horizontally Rotating Rat
My experience with Lemmy is that pretty much everyone hates AI and there's almost always a person calling out when an image or video seems to be AI.