Foreign caller claiming to be working for a trade show in Las Vegas that had our company "registered as a vendor".  We are a small branch of a HUGE company, and he had no contact name for me, just wanted me to pull a random name for him out of they sky or transfer him to god-knows-where, apparently.  When I told him we don't do that at this location, he tried to argue with me, because naturally, he knows what we do here and who works here better than I do.  I asked him what kind of registration process they have that doesn't require their "vendors" to include a contact name and phone number, he started to jabber defensively again, and I hung up on him.  I've had these calls many times before, but this was a new phone number for them.  These guys are like a boil on the butt of a cockroach.  If cockroaches have butts.  I have no idea.  Scammer scum.