It's just an email that say something like "format your hard drive, then send this to someone else" or "go encrypt all the data on your own drive, if you paypal me $10 I will send you the password"
Proved not to work on thin clients, thick clients are no problem though. Thicker the better.
it the digital version of "nobody move, or the sheriff gets it" from Blazing Saddles
Actually I blame Vernon for this, as his PGP block has "flU" in the middle of line 13...and "WawgRuyON7" is quite clearly part of the summoning chant to call Cthulhu.