No they can't, earlier bids get priorty. It's built into the system to favour earlier higher bids. Sniping is fair because the highest bidder still wins, whether it's someone who bid a day before, or another sniper.
Sniping means that you don't get competitive jackasses that want to beat your bid by 25c. Because they don't know the snipers max bid, they just have to bid what the max they want to pay, rather than trying to win something as cheap as possible over the other bidders.
edit: Sniping is needed because so many people are willing to pay more than retail for so many items on ebay for some reason. Why? Because there's a lot of people out there that get competitive and keep bidding to 'win' for some reason and don't have any common sense.
The fact that those people are out there means others have to use sniping techniques to avoid those bidders.
End result is things still get sold for the amount that someone was willing to pay, there's as many mentions of people placing a ridiculously high bid to guarantee a win as there are people 'sniping' a bargain. So, over all even with sniping ebay prices are even between wins for early bidders, high bidders and snipers. The only reason for that being equal is because no matter the method used, the highest bidder will still win.
Can't you see that your reply here admits that sniping causes items to be sold for less than they would otherwise. That means thet the sniping system has stolen that much from the seller.
anything that causes the item to sell for less then it would under an open auction is stealing from the seller.
I find it funny how some of the snipers are actually touting their sniping as "good for the system" and preventing fraud or something.
Real auction continue until all bidders are finished, not at an arbitrary cutoff. Sniping is the death of honest auctions.