Friends,
All your concerns are genuine. Recently I found one major loop-hole in the eBay system and none of the people at eBay are able to fix it or reply to me.
eBay has provided a "Blocked Bidder" facility to a seller. But this is of no use to any seller. When you block a bidder because of their harassment to you, then the same bidder can register another account and place orders.
Recently, I blocked a bidder because he used to demand huge discount after purchasing products from me. He used to ask such discounts that were impossible to give (30% to 40%). He also used to send me very aggressive emails due to which I added this buyer in my Blocked Bidder's list. Now the same buyer has registered another account and purchased goods worth USD 360.00 and they have continued the same demands in the new account also.
When I contacted eBay about this, they said they cannot help me. This means sellers are not at all protected on eBay.
Regards,
Mustufa