This is very bad seeing that bounty hunters could still use same address to enroll in one campaign. at their post on the thread, you can report to the moderator to look after the situations or possibly ban them all.
It's not like the people in the business cares and it's not like you will be able to recognize it at first glance that it's the same address. As long as there's an unlimited way to make an address, these scummy bounty hunters and scammers will be able to deceive people of good standing.