Ive been to loads of car auctions where they bounce bids off the wall (have even seen the wall win a couple of times and the car have to come back trhough

), I really cant see the harm in it, no one is being forced to pay more than they want to for anything.
Ebay only care cause they are losing reserve fee charges.
Its ebay themselves that make ebay auctions less good value, with all the excessive fees, not shill bidders