Actually, it does qualify as a scam. People have had criminal charges doing the same.
Shills, or "potted plants", are sometimes employed in auctions. Driving prices up with phony bids, they seek to provoke a bidding war among other participants. Often they are told by the seller precisely how high to bid, as the seller actually pays the price (to himself, of course) if the item does not sell, losing only the auction fees. Shilling has a substantially higher rate of occurrence in online auctions, where any user with multiple accounts can bid on their own items. Many online auction sites employ sophisticated (and usually secret) methods to detect collusion. The online auction site eBay forbids shilling; its rules do not allow friends or employees of a person selling an item to bid on the item.[6]
In his book Fake: Forgery, Lies, & eBay, Kenneth Walton describes how he and his cohorts placed shill bids on hundreds of eBay auctions over the course of a year. Walton and his associates were charged and convicted of fraud by the United States Attorney for their eBay shill bidding.[7]
http://en.wikipedia.org/wiki/Shill#Auctions
I didn't know that, it still doesn't seem like it should be Illegal. No one is forcing the other person to outbid the guy. If someone is willing to pay over the shill bid, then isn't the item worth that ?
Auctions are not about what something is worth, they're about opportunity. Shill bidding something up 10 BTC steals 10 BTC worth of discount opportunity away from the winner, effectively scamming them of 10 BTC. You'll find that if you keep arguing this, you're going to come around to arguing why my troll bet with some members of the community was just trolling and not a real bet and the outcome of this thread will not be pretty.