I also heard about this problem. But I am just wondering why can't campaign manager can't detect it since there should be one letter difference between the two account? BuT most of the campaign manager can easily detect it. Please avoid doing this bounties participants it teaches how to be dishonest and cheat.
Its not that they can't detect it, they are just too occupied managing their campaign like counting and reviewing of posts from all the participants and I know that you have an idea how much workload a campaign manager has just by doing those. And like I already said, the best solution they have so far is just the issue form that we can fill-up regarding our concern if we detected someone using our information.