@Gargron Half the time it's impossible to find the artist. The other half it's impossible to see wether or not it's AI.
I get the need for similar rules but fear for a lot of false reports and people bugging their fellow donners to no end about images without sources, just for funsies.
@HeyLaiverd @Gargron When it's impossible to find the author, I've seen many folks post something along the lines of "Not mine, found it on [insert website/social network name here] and couldn't find the author, if you know the author let me know!". Would that be enough in the way of attribution?