Do you really believe it is only 3rd world guys that spam "when moon"? Or it is only 3rd world members that post wrong English? There could be very intelligent and purposeful 3rd world members here supporting this forum. Generalizing all as 3rd world monkeys is rather insulting to such persons since they come from the '3rd' world countries though.
I think this is what he means.
The issue is these guys farm 100's of accounts each, so 10 account spammers can control 1000 accounts, so even if 1 in 10 of users are legitimate (it wont be it will likely be 1 in 100) they will be diluted by the ridiculous amount of spam posters.
I hope that makes it clearer to you how much of an issue it is on this forum