Throw in at least Ukrainians, Romanians and Bulgarians with the Russians. Romanian gypsies make kleptomania an art form. 
As a Romanian non-gipsy, I agree with this. Also, our gipsy beggars that go to western european countries are hardcore... Usually it's an organized thing, and the person 'handling' them makes 20K/week (€) just from the money that people throw at them. So yeah... don't give beggars money, even if they're children or women or dogs or anything. Usually it's a highly-organized thing.
Did I mention we're good at internet fraud/scams too? My cousin's classmate and a few other guys sold a fighter jet online to some American. They even asked for fuel money up front to "deliver the jet". They got caught a while after that tho. Oh, and Romanians broke into NASA/FBI/CIA servers more than anonymous combined.
Basically: Hide yo` shit; we be stealin both online and IRL. No place is safe. Go Romania ~__~
... it's actually sad because Romania is a lovely country, but these motherfuckers give us a bad name.