There's some stirring of the pot, and it's because México has had an increase of violence this year. Mexico has experienced about 2,000 murders per month during the first half of the year, more in June, when a record was made with over 2,234 murders.
Areas that have experienced "narco" related shootings have included the Los Cabo's area in Baja California, as well as Cancún and vicinity; even the remote-ish hotel zone experienced a multiple shooting earlier this year. There are reports of armed response vigilante groups forming in the "Riviera Maya" area as a result of shootings in the Playa Del Carmen area - earlier this year at a music festival.
Areas of Mexico impacted by "narco" violence (Bloomberg)
(Acapulco has been a "no go" area for many, including Mexicans, as the state of Guerrero has been the scene of "Hatfield-McCoy feud type killings for decades and the narcotraffickers have a strong presence, along with corrupt authority.)
The Puerto Vallarta / Nayarit coast area and Oaxaca coast seem to still be fine.
Additional sources:
2 Bodies Found, Shootout Kills 1 in Mexico Resort of Cancun
June 16, 2017 8:00 PM, Associated Press / VOA
Shootout in Cancun: Narcos Take Their War Into Hot Beach Resorts
By Nacha Cattan and Eric Martin, Bloomberg, July 21, 2017, 10:34 AM PDT
The risks are not high for tourists given the numbers and relative isolation of the hotel zones, and can likely be further minimized by avoiding the downtown club scene and inquiring of locals about places to avoid and / of times of day or night to be "in" by. Would I cancel my trip to Cancún or San José / Cabo San Lucas areas? No, but I'd be aware abdvtry to get some local advice from reliable people. You won't see much local publicity, and some people may downplay the issue - nobody relying on their livelihood in a tourist area is going to publish information that will frighten those tourists away.
I continue to stay away from my family's farms in rural Tamaulipas, and some areas I used to love in Veracruz and Michoacán states.