I asked a question on StackOverflow recently, and got no answers. I applied a 500 point bounty to said question in an attempt to encourage answers. The only answer I have as of yet is someone obviously trying to "steal the bounty" -- i.e. the posted link is only vaguely related to the question I actually asked.
Is there a way to prevent the bounty award to that particular answer when time runs out on the bounty?