Welcome to bitcointalk. The majority of the people posting here are just bot and spammer accounts being farmed to abuse bounties. Until something changes then this will never stop. Put a merit requirement on Junior Members or preferably get rid of signatures up until Member level or even higher. These bot accounts can join a signature campaign at Junior which merely requires 30 activity that bots and spammers can get in 2-4 weeks. Good luck them ever getting ten merits to become a Member then. As long as you can farm Junior accounts by doing nothing but making 30 spam posts or copy and pastes then bots will continue to do this in their thousands. You can earn a decent living from bounties alone if you have enough Junior accounts and this just encourages the creation of many more. Make signatures a reward for those who have contributed something here. Getting ten merit isn't outrageous and should be fairly easy for even a half decent poster but spammers will get no where.