He can easily recover the account and the money that you would have put in this account

, (if he's the real owner

)
Also if he's not the real owner, you could get some troubles

Please tell me how you can recover/take back those account if you change all pass and setup 2fa on polo and email account that linked with them
Maybe by contacting the support ? with some proof (Id card,selfie,...)and by replying to some question, you can recover this account
So with that bold statement of yours its just a theory of your sir..please dont judge someone just by some maybe theory
Support ticket only can open with linked poloniex account
And what the profit for me just to freeze account im selling...maybe yes if i send account first but buyer dont pay but it will take month just to get poloniex attention
Btw thanks for bumping this thread sir
Have a nice day