Maybe we need downvotes to really hurt resource credits? Would make them "rarer", less vindictive, and by doing a downvote, it took away a significant amount of your ability (until it recharged) to do other operations on the platform.
Or some sort of log-function for resource credits that each other downvote would cost incrementally more (approaching an infinite cost) - because in the essence that some people are targeted by them (meaninglessly) - it is nothing other than spam on the blockchain if it is being treated as a reddit downvote rather than as something to remove rewards from a pending post, thus distributing them back to everyone else on chain.
good points, there's probably some improvements that can be made in terms of bloat and RC too, such as spamming the same long comment over and over which takes space
Defend the space in our blocks! They're reserved for future users!
I'm not too worried about it, doubt technology will stop growing the space and costs required but it'd still be nice to come up with something to make blatant spam harder to do.