Boards and downvotes without reading
The amount of people downvoting without actuslly reading the topic is a joke. I recently started to add polls to topics to see wether people actually downvote because they truely dislike the idea, or just simply because of the username who posted it. The result is fascinating, but not suprising: While the topic got downvoted to 0, a vast majority of people who actually read the topic agreed and voted for the idea in the poll (Example: http://boards.na.leagueoflegends.com/en/c/gameplay-balance/irVZwEU8-reduce-the-cooldown-of-boomerang-blade-as-it-levels-up )
CONCLUSION: Remove the ability the topic in the topic-preview (board-vision). Force people to actully go into a topic to vote, it won't change much - but please also move the upvote/downvote buttom to the bottom of a post. Possibly even add a timer befor you can vote to increase the amount of people who actually read the startpost.