Why are people stupid? Ebay and Porsche Parts

[Perfectlap]

ok so I'm looking for a certain Porsche item and I notice that this particular part is a no reserve auction for an item that is large and can't be shipped.
Meaning: the pool of bidders will be small
Days before the acution close I noticed a few bone heads are bidding up the price well up.

My question:

WHY DO PEOPLE DO THIS???!!!!

so you have a price in your head of what you are willing to pay. Why not just wait until the day of the auction and post your bid a few hours (TOPS) before the auction close.
What is the sense of bidding up the price DAYS[U] before the auction close?
Generally I mark an absolute highest price I'm willing to pay and if I'm sitting near a computer before the close I'll submit ONE bid with a few minutes to go. Sometimes I've have to drive off the highway and duck into a Kinkos to bid on the auction at one of their computers.

There must be a term for a bone head who bids up a price and doesn't end up bidding at all on the day of the auction. That stupidness only helps the seller in a no reserve auction. grrr....