Only 10% of Mexico is a no go zone. For traveling the rest of Mexico, be careful, be alert and stay aware of your surroundings.
This particular comment has always been true about traveling in Mexico and MOST countries!!!
We were warned when we first started traveling here in the 1980's that we were to avoid Michoacan and Cuilican, and to beware of vados on the Baja, because there could/would be bad guys there to shake us down.
Nothing bad has happened to us, but we have had some extremely interesting things occur.
Once again, USE COMMON SENSE! If someone who lives and travels here shares that there is a problem in an area, and the reports support that, listen to them!!!