You can't kill the autovote system without frantically increasing RC cost (this would only affect those pesky barely any stake autovoters so you wouldn't see 100+ votes on a post in the first minute with barely $0.1 rewards pending) or the other option would be to place some other fee on casting a vote which would also drain those smaller users, especially those casting 0.2% votes for no fucking reason since their accounts are so small they're never going to earn even 0.000001 hp even if we had that many decimals.

Maybe the solution is a combination of RC costs and the "optimal" 10 votes per day we have, like if you're casting 500 votes per day and you have less than 1000 HP stake it should cost you more RC than leaving 500 comments per day with same amount of stake - currently it's the other way around. Not sure, it's quite technical and I'm not the best to think about that but could make for a good post and discussion in the near future. There's been some discussion around those with stake purposely spamming the chain which causes bloat to witnesses who want to maintain the full ledger which is 160gb and growing at this point I believe. So imagine how much of that 160gb are these spammy tiny votes from accounts with no stake getting no returns but able to do it for free using free services like hive.vote, etc. It may not be a big issue now but if we start seeing 10-100x increase in users it'd mean the same increase in that activity as well.