This is something I've wanted to do since I started playing L2 2 years ago...
Here's the run down-
Mr. Orc is spamming everyone in Dion with trade requests, asking for adena... harmless beggar? Maybe, but I protect myself anyway. I go to my warehouse and pull out some extra things to make myself overweight, then proceed to spam HIM with trade requests asking for adena while running around slow as a turtle behind him.
After about 15 minutes of wasted time he decides that he would try to scam me out of my c grade bow... tried to invite me into a finder's keepers party so I knew he was setting up the scam. I continue spamming him with trade requests as I run to the warehouse and redeposit the extra weight.
He tells me to "Do like this" and throws his triple edged jams far on the other side of himself away from me. I run quickly as Dark elves are faster than orcs, and pick up his weapon.
Scammer = pwnt.
http://img240.imageshack.us/my.php?image=shot00030xt3.jpg
For those of you who have EVER been scammed by anyone, I hope this makes you feel better.