I would echo a couple of the above replies.
It does happen a lot, I've had one WG say she is Latvian on visit 1, Lithuanian on visit 2 and Ukrainian on visit 3 - take your pick. Have a close look at AW profiles, loads of examples of them stating one nationality in the text and then Romanian in the entry at the bottom of the profile - spotted one this morning claiming to be Swiss.
The problem with the area I punt in is that there are loads of Romanian profiles, most are too risky for me to even consider - they have the standard pictures, profile name changes, lower price, many offer bareback and so on. I have them down as a scam of some sort. Then you have a few Romanian girls who could well be genuine but they are in the minority. The problem is, whoever organizes the scams seems to think that we are stupid enough to look at the bit where they say French, Spanish, Swiss or whatever and not spot the Romanian nationality below. No doubt some fall for it and so it perpetuates.