They seem to be going either Ukraina or Romania or Albania every year.
There were some tricks involved, such as two wallets, one for money and the other with invalid card and few euros to pull when policeman stops you. Stories about police breathalyzer that shows even you did not drink anything - I understand you have to convince the policeman to blow too, haha
They have language advantage, russian is understood there and we all had mandatory russian classes in school.
They love it for sure.