I don't know what to say in a case like that, what it sounds like is that you didn't check the little checkmark which makes it so nobody can bid on your products who is in that country or from that particular country.
I know on ioffer.com for instance you can block everybody from bidding at all, who comes from a particular country. So you can block everyone according to region. That way you only sell in locations that the sort of crime you are referring to, is very rare.
I also know because eBay is such a scam in itself, I wouldn't even bother to be honest about it. I stopped doing eBay much at all a while ago.
It's now all ioffer.com, Amazon, Craigslist and the new Godaddy Marketplace for me. I sell tons of goods through Godaddy and Amazon lately, then a bunch on iOffer and I always use the golden rules when selling on Craigslist.
eBay to me is pure trash and I wouldn't go there if someone put a rifle to my back, absolutely not. Out of the very rare chance that I use them, I use it for vintage goods I can not unload anywhere else. And I now get about that level of traffic which eBay normally gets anyhow, so I wouldn't go back.