Remove signatures from lower ranks completely and/or make a merit requirement to become a Junior. Ideally you wouldn't be able to have a signature until you've become a Member which requires ten merit. The forum is being over-populated with clueless kids who have little to no knowledge about bitcoin but are churning out nonsense just to get paid. This can't be acceptable. If you can't acquire ten merit then you shouldn't be able to earn here and these people should stick to claiming bounties until they can earn the merit.