Lawyer here. These are always so misleading and largely incorrect. I don't believe most of these and neither should you. The way these dumb myths become popular is by imagining hypothetical situations that could break the law. Take the Swiss one, for example. The law says nothing about your car door. You just cannot make overly loud and disruptive noise during the night (as is the case in pretty much every country with laws on public peace and order), so that becomes "it's illegal to slam your car door". Same goes for the Greek one. No one can have their license withdrawn for being poorly dressed or unbathed. This applies only to taxi drivers who can have their [i]taxi license[/i] revoked if they don't meet general requirements of professionalism (as is the case for hundreds of jobs in many countries). The Paraguay dueling one? [url=https://adisquisitivemind.wordpress.com/2013/06/30/lesson-307-dueling-is-not-in-fact-lega-in-paraguay/]Not a shred of truth to it.[/url] The Reykjavic dog one? Not at all illegal, your dog [url=http://icelandinpictures.com/post/5670737648/why-are-dogs-banned-in-reykjavik-or-are-they]just needs to be registered[/url] to a person and an address. Another example would be a supposed law that says it's illegal to tie a bison to a fire hydrant in Montana. This might be technically correct, but that's only because the law says that you cannot obstruct access to a fire hydrant in any way, which obviously includes the bison thing too but doesn't mention it specifically and is actually illegal in the entire country. It's like saying "wow, did you know that it's a law in the USA that you cannot put on clown make-up and juggle butt naked on a unicycle within 20 feet of a traffic light??". Well, duh, but that's because just being naked in public can be considered public indecency. None of the other stuff matters and it's not actually part of the law. Common sense and basic fact checking, people.