Regular reminder that this is strictly true for the US. For other countries YMMV by following this approach. E.g. it's generally a bad idea to shut up complete

Regular reminder that this is strictly true for the US. For other countries YMMV by following this approach. E.g. it's generally a bad idea to shut up completely once you're in a police station in Japan, as they may hold you up for 23 days w/o pressing charges and allowing you to communicate with the outside world.