As a foreigner you are supposed to have one of the following on you at all times: ARC or passport. I’ve never been asked, though the only two run-ins I’ve had with police didn’t really involve me. When I was on visas, I hardly ever took my passport with me. It’s ratty enough just from travels. Now that I have an ARC I do keep it with me. If you’re white and look respectable and don’t frequent nightclubs (which frequently get raided for drug fishing expeditions) then you probably don’t need to worry about it, but don’t go blaming me for bad advice if you get fined.
Guess you guys haven’t read much Robert Anton Wilson. If you aren’t familiar with him, see rawilson.com/ He wrote a couple of oddball books about the Illuminati, the secret society which controls all mankind, or at least Europe. Fnords, not to be confused with long valleys along the coast of Norway, are basically things hidden between the lines, in newspaper articles, books, speeches, etc. which are intended to frighten, placate, or otherwise manipulate your opinions, beliefs and emotions. Being able to see the fnords is one step on the path to supreme enlightment.
(If you are a fan of RAW, the new DVD for the film Maybe Logic is very very worth it. It includes not only the film but an additional double sided DVD packed with his TV appearances, convention appearances, interviews, etc.)