Protection isnt high on Ebays priority.
Making the maximim of profit is.
Otherwise, features like " do not allow users to bid if they are registered in a country I dont ship to", would be recommended defaults for basic users.
Also, I havent found a way to blacklist a user from bidding/buying by account. ( ie restricting someone thats scammed you before to not bid on new items listed )
Ebay are struggling to get round the people that are 'playing' the rules and getting away with murder. In the process of this, they are narrowing the accepted field.
As with everything in life, the safer something becomes, the less fun it is!