If the user is already banned how does this help? If they've already recovered and account or charged back a PP transaction how is this page going to prevent it again?
It's an extremely toxic community it's always going to happen I don't think your mind "can be at ease" when dealing with folks on this website, as we've all seen time and time again the amount of FB / Rep isn't synonymous with whether they will scam.
I just don't see much use looking up a banned user other than for the lolz, if they truly want to scam again they will just vade.