I'm all for the 'kick his *** and return the trans, rectally" train of thought. Like in the movies where you show up with Zeke from the loading docks, who owes you big favor, and Zeke smacks the guy over the head with a frying pan until he coughs up the dough.
Unfortunately, real life is a bit different. When the guy is 5 states away from you, it's hard to put your hands on him. It's also hard to get blood out of a turnip....chances are extremely good the money you gave him 2 years ago is long, long gone. It's not like you're gonna dip in to the trust fund his granny left him. You could report him to the authorities, but let's not lose sight of the fact that we now live in a couuntry where if you want a new TV, you can protest one from Target with no consequences. In fact, you can blatantly commit federal crimes and no one will bother pursuing you. So I doubt Sergeant Ludowski in gonna go chase down some guy over a 4th gear issue.
Most of all....few of us have the time on our hands to chase some retard around the country. We have jobs, families, and lots of other stuff to do every day. I sure can't tell my company I'll be out for 7 days while I go to Seattle to plant a car bomb.
That's the beauty of forums like this one....word gets around and the single best way to hurt the guy is to make sure everyone knows.