Also no real way to go to war with these people. They are just alternate accounts that don't post, comment, reply, etc. Therefore there is nothing they post that can be counter voted on. Also I do not like the idea of down vote wars.
You could up vote things they down vote but remember they switched things on Hive so downvotes cost the downvoter nothing but you can only up vote so many times a day. So upvoting to counter downvotes would in the long run likely be a victory for the down voter.