Currently there are many bounty hunters who only use a Newbie account. Which means they have created a new account, maybe not just one.
Lots of people who have multiple accounts.
better in the future, allowed to join the Bounty is a minimum Jr.Member account.
I also often find people who intentionally use my account username to follow the bounty.
Many times my bitcointalk profile was involved in bounty campaign which I have never joined.
There are more scammers and fake profiles than you can imagine! Be careful, bounties are under attack and greedy hunters will destroy the future of bounties.