There are a lot of different types of scammers active in bounty section. Protecting our IDs from them seems to be a challenge. Like you, I have had such a problem. A bounty cheater named DeXiam used my details to participate Butter Swap bounty and stolen my work in Amepay bounty. I put a negative trust on his profile. But since I am not a DT member, he does not care about it.
Then I put a negative trust on his profile but he still doesn't stop. .
Cheater DeXiam not only copies the posts of mine but also posts from other members and then posted on his own profile. I can't find any telegram or social media profile of his own. Surprisingly, after quoting his bounty report in red, Bounty manager updating his weekly stakes in spreedsheet. Below I am giving an example of some copy post of DeXiam.
He also copied and posted the report in KittieFight, Block365, Space-iZ, ClinTex etc. campaigns. I forbade him to do these things as PM but he did not respond.
He uses different Telegram Usernames in different campaigns. In fact, none of these are his own.