Yeah, I think RC need to have a heavier tax on "similar" tx's, especially in the comment section. If an account constantly just says

"congrats, you've earned 1 fart token"

it needs to make those cost more than genuine comments unique from one another. But I guess those could easily be gamed as well by just adding a random letter after the original comment.

Blockchain restrictions on abuse and bloat are not easy to deal with!