We just set up a burn for downvote feature for my project helios.voter over on hive, but to use it you would need an account that is not on the spaminator blacklist. If you have another account and are interested in making some downvotes there I can send you some HELIOS for fighting spam. Were setting up the UI for the downvote website next week, right now it just works manually by sending HELIOS to helios.dburn with the memo of the post or comment to be downvoted.