Be honest with you the entire need for a downvote system is stupid and should be removed. If you seriously have to rely on downvotes to try and keep people from spamming etc well there there's something seriously flawed with the system itself. Downvotes should be removed in HF25 and replaced with something else to prevent spamming. They are misused far to often. With tribes I believe some people simply mark wrong tags and can be downvoted because of that. Instead I'd like to see something like a flag where if that tag doesn't belong to that community it can be flagged by trusted curator accounts to not receive rewards from it. No negative effect other then you're not getting payout from that tribe because the content doesn't below there.