The user who put him in their trust list. Malboroza is very reputable forum user here because he busted a lot of scammers and cheaters. He has the right to tag you because of the solid connection involving you to multiple account that cheat bounty campaigns.

Also, He is now long active so the tag will stay there forever until he came back and removes it or all the user that put him on their trust list will remove him or distrust him which is not gonna happened because he leave the forum with same reputation.

You can still use the marketplace by using an escrow to your deals.