There is no doubt that these are alt farms, but for me personally there is a much bigger problem in the campaign manager who had to notice what was happening in front of his nose - unless he himself is involved.
The thing is, its not in altcoin bounty managers interest to notice altcoin farms operating in their campaigns because if they remove those, there won't be more than couple of dozens of genuine users doing them and how will they sell their service to potential clients then? They need numbers, and the only way to get that is to allow army of newbie accounts to join.
There is a simple solution to remove farms (or atleast majority of them)- introduce Jr Member as minimum requirement but that won't happen of course due before mentioned reason.