I think it is horrible that many sellers actually get away with selling fakes and have 100% feedback because people are unaware because they have little to no experience with designer items...
But I honestly think that once the auction is over and feedback has been given there is nothing more that can be done. I always try to report all the fakes I see but I don't know whether eBay does anyting with it and it sure is not enough to get rid of all the fakes.
I feel eBay should provide (with those auctions) links to sites like tPF, mypoupette and other places where you can have items authenticated!! Because I feel most people just have no clue about how they would be able to have an "experts" opinion. Or they ask an "expert" friends opinion who happens to have one LV but really isn't capable of judging!