While Mexican authorities are tolerant of alcohol, they are decidedly intolerant of other substances such as marijuana, psychedelics, cocaine, and heroin. Getting caught with such drugs in Mexico usually leads to swift and severe results.
Equally swift is the punishment for nude sunbathing, which is both illegal in public and offensive to Mexicans. Confine your nudist colony to very private locations.
Although with decreasing frequency lately, traffic police in Puerto Vallarta sometimes seem to watch foreign cars with eagle eyes. Officers seem to inhabit busy intersections and one-way streets, waiting for confused tourists to make a wrong move. If they whistle you over, stop immediately or you will really get into hot water. If guilty, say “Lo siento” (“I’m sorry”) and be cooperative. Although the officer probably won’t mention it, he or she is usually hoping that you’ll cough up a $20 mordida (bribe) for the privilege of driving away.
Don’t do it. Although he may hint at confiscating your car, calmly ask for an official boleto (written traffic ticket, if you’re guilty) in exchange for your driver’s license (have a copy), which the officer will probably keep if he writes a ticket. If after a few minutes no money appears, the officer will most likely give you back your driver’s license rather than go to the trouble of writing the ticket. If not, the worst that will usually happen is you will have to go to the presidencia municipal (city hall) the next morning and pay the $20 to a clerk in exchange for your driver’s license.