i think when you just got scammed and there is all proof and he is going to get locked to drag the fg back to the user who had it so he would had his fg back.

No, because then two friends could just "scam" each other and get free FG this is not a good idea.

no, when a scammer wants unlocked they can repay there scams to the person they scammed, that way that user gets his stuff back

how could this happen? the fg goes away whit scammer and goes back to the one who scammed

WHAT? That doesn't make any sense!

no. We have people to mediate trades for you so you don't get scammed. There is no excuse not to use them and if you choose to trade without a mediator, you do it at your own risk. Part of the risk is that if you get scammed you lose everything unless the scammer chooses to repay their scams.