It'd be interesting to see how the way common images are reused (for example in memes by only adding text) would be enough to change that hash. If it wasn't enough it could spread very quickly.

Of course I'd dare not research or tinker with it lest I'll be added to a list somewhere such is the chilling effect.

I guess in that case they'd delete that single hash from the database because they'd still have an endless (sadly) supply of other bad image hashes to use instead.