Its normal organized crime. Back in a day, the Slovakia in Europe was extremely "covered" by stolen bikes from germany, austria, france... And not normal ones. A lot of prototypes, dorados when they were not on the market, etc....
It was well know that there are some bands from slovakia and probably poland that go on world cups in europe just for bikes...
A remember when Balfa was popular mark, a guy who raced for the german distributor lost his bike because of theft. And i have found it in one czech shop. I knew its stolen because no one had it in czech (the DH scene was not that big and the bikes were really expensive). And i knew who brought that bike into the shop. So i went on some german mtb forums and tried to ask guys if there is some stolen Balfa in germany. I was given a contact to a guy who owned that bike and he came back to czech for his stolen bike.
Trust me, he was really happy and i was too
And if i remember well, that thief was arrested by police as he was a member of some organized crime and they found more things at his home. Too bad, i met him many times again on all over czech races again.
But for now, its a history. Of course there are still stolen bikes but i think its no more that much organized as it was. I hope.
P.S.: I have nothing againts guys from slovakia or poland. I have many friends there.