There are lots of rumors swirling around out there about safety and tainted alcohol. Remember the bird flu, swine flu, Zika. I am not saying that everything is perfectly safe but please do your homework and use common sense.
Quintana Roo (includes Cancun, Cozumel, Playa del Carmen, Riviera Maya, and Tulum): No advisory is in effect. However, U.S. citizens should exercise caution when traveling south of Felipe Carrillo Puerto or east of Jose Maria Morelos as cellular and internet services are virtually non-existent.
US State Dept Travel Advisory