I have personally deleted the "pixi" account multiple times already. :\
You could register pixi so the scammer can't use pixi again, still doesn't stop the scammer from using another username. You're trying your best scout, it's impossible to ban this scammer due to the nature of Tor, all we can do as a community is keep awareness up on this scam.
Yes, but that means every time I delete one of their usernames I have to then register it myself, and they will just continue to start new ones. I'm doing the best I can, but deleting their accounts and then re-registering them myself is not really a viable option.