Yep, I said it. Introduce Hellbanning on aj. While it's sort of sneaky as fuck, it has an enormous amount of potential. Seeing how well it's working on sites such as hackernews or something awful, I think it would be a great addition to AJ.
I have no idea if it needs special implementation as you're running on vBulletin(right?),
Like it was back in wotlk. 25 Conquest points for a daily bg win that you otherwise can't get. It's a miniscule benefit, but gives enough incentive for players to play some more bgs and put a teeny tiny bit of effort in to it.