If you delete the bounty section on the forum, then there wouldn't be that many icos advertising their ICO, but I see your point too.
To be honest, I would like to see the bounties section be deleted as well if any of these things don't work.
Many forum out there not only bitcointalk. They can advertise at icoforums and Altcoinstalks. Sometimes the other upper ranks are OA. Judging a shit post is a subjective. Maybe its a shit posts for you but it is a quality post to other. So Don't Discriminate lower ranks.