The fact that mod's don't ban scamers makes them useless.
As for the proof here's a screen shot of the payment. http://postimg.org/image/pmctfn76r/ the who.is for the http://who.is/whois/http://toxcoin.com the site was created on December 30 2014, which should have been a red flag. I don't know if I want to take the time to completely find out who he is,
It is simple : the staff doesn't involve in any "scam accusation" they are not judges and this is a forum not a law court. If it seems a scam doesn't sign up, you should no trust no one.
It isn't a scam accusation when there is plenty of proof and it's not just me, and no asked them to be judges but in every other forum I use mods ban scammers. And most forums have some type of "shit" list where banned users go.
No I don't think this is the right decision to resolve the problem, I have heard they don't ban the scammer users because they (scammer) may repay all the other users. So the unique way is : give them a negative trust and stop. You can try to "ask" the scammer if he will give you back the money (in some cases it worked).
No point of asking for it back lol, it never did leave my bank account because payeer was a bit to slow in taking the money out and I got the payment blocked. but I'm surprised they don't shut down any of his threads advising his site.