Only time I was asked for passport was.
Only time I was asked to show passport in German FKK was when I pay over few hundred euro with credit card.
In Artemis, they ask to show passport, when you buy 12 times cards and you pay with credit card, this maybe just a routine check when it exceed certain amount.
Also even German FKK is safe and I never had personal problem, some trouble do happen sometimes like big fight in Artemis few years ago involving 3 clients and security of the club that made into German newspaper, so I am sure each FKK club have their own black list for their own security precautions to avoid such events from happening again.
But I never heard that someone was asked to present I'd in FKK except when you pay with your credit card over few hundred euro (this I experience each time).
I did read in some other threads that some clubs in NRW do not accept or fancy some clients who looks like form such and such nation, but all the FKK clubs I went to seems very international to me both for girls and clients.
Romania during Soviet Era
I think this article touches on some things--that may explain why Romanians are battle-hardened and can do jobs like this-some without complaint. As the article explains, there was a generation of neglected children back in the 1970's and 1980's due to some misguided policies--so my guess is a lot of the girls were born into broken homes.
"When Ceausescu took power in 1965, Romania had a declining birth rate and one of the highest rates of abortions and divorce in eastern Europe. In the name of procreation, the new leader instituted a number of radical policies: banning abortion, restricting divorce, instituting a 'childlessness tax' and providing financial incentives for working mothers. He lowered the marriage age to 15 and awarded mothers medals based on the number of children they had. Perhaps the most extreme measure was the 'menstrual police': an army of gynaecologists who would enter schools and workplaces, investigating non-pregnant women and miscarriages. ".
[URL]http://www.abc.net.au/radionational/programs/allinthemind/inside-the-iron-curtains-orphanages/5543388[/URL]