They, the all knowing counsel - Sighhhh.
Listen, whereever you travel, be it to the supermarket, or to Mexico you should be careful of your surroundings.
We took our 2 girls to Los Cabos and stayed at the Playa Grande for a week and had a fabulous time. One major drawback was that the beach was unusable, but the resort had 5 pools, 2 great for kids, 2 jacuzzis and was really nice and clean.
I have heard of killing in Mexico, but there are killings here in NJ, NY and sometimes in our own neighborhood. And guess what, you don't have to be a tourist. Pick pocketing has always been a problem, which happens a lot in Mexico as well as the Mall at Shorthills.
Go on your trip, stay safe and enjoy.
D