as much as I mourn the presence of aesthetic blogs on tumblr, it was absolutely true that the vast majority of posts were images taken without credit or permission. so it doesn't surprise me at all that now, almost any kind of post with a minimal caption, maybe even linked and "credited", is ai.
I think it'd be worth reminding people to be diligent, to prioritize sharing images/videos you KNOW for a fact that the OP created. art, photography, cat videos, memes, etc. honestly, even if you DO know the art was created by a real person, you don't know if that artist was ok with it being shared on a website they don't have an account on