The same has been used against me, in revenge for outbidding someone! "Followed" me around, upping the bid on everything I bid on, just for spite. Some countries' privacy laws, such as Germany's, do not allow Ebat to show such information; that's what I would like to see them adopt for all.
----- Original Message ----- Another use that I use that information for is to track bidders that have similar interests to me. I can track items they are bidding on. If they have found something that I also want, I'll bid on it. Some may not like this , but it is an auction and everything is open to everyone equally.
