Reading your other replies, didn't know that flagging cost you VP, but I also kinda get why it does, otherwise it's just as easy to abuse as upvoting. There definitely needs to be some kind of a smart system, maybe if the flagging worked on a group vote system, it costs you nothing, but doesn't take effect unless a certain other amount of people flag it too, but there would need to be a ratio for posts with less traffic, so yea, it's not an easy solution, but its good to hear it's on people's minds at least.
I didn't quite get your last statement tho, are you referring to accounts with some decent VP that don't participate in community but leech by using their VP to just further up their own accounts?