If he's talking about the reports themselves, I would disagree that they're spam. As long as the reports are in the section that they're supposed to be in, there's no reason to complain.
true... but their posts still counted to total post and activity
this just encourages them to post as a way to gain rank/activity which can be seen as 'legal spam'
I would suggest to set posts in bounties subforum as uncounted and unmeritable post
and/or mandatory removal for any bounty reports older than a month or so