The easy way to verify a PM would be by asking reporting it to a Global Mods, and ask them to confirm authenticity. But that goes off-topic here.
How can I report a PM I didn't send? The point being Theymos was not neutral, and OgNasty took advantage of that to scam thousands of bitcoins.
But this is off topic. As I post more info on the nastyscam website (I update it weekly), I am
trying to sit on my hands and not respond to his lies.