I was in Puerto Vallarta last week and nobody gave me any trouble. I was sort of discreet and flew pretty high and fast (didn't hover close to anybody). I took off once from a beach that was away from any hotels (so nobody really there). I also flew a lot from my hotel when I moved to another location much further away from the airport.
There was one area (Marina) that's close to the airport so I didn't fly much there (only for about 5 minutes and brought it back down) but there was another random guy flying his drone out in the open in the middle of the beach closer to the airport than I was, etc. Although it's technically only a few miles from the airport, airplanes don't go in this area because it's full of hotel resorts so all airplanes fly another route away from here.
I stuck with US laws that I know...so I stayed under 400 ft, etc.