The picture is of an unforgettable Acapulco atrocity that still gives me chills and lasting mental pain.
So, to answer your question, "Sure it will!"
And that advice that "nothing will happen, if you respect people, don't show off, etc... is pure bunk! Criminals that specialize in kidnappings, extorion, "set-ups" of all kinds are experts identifying pollos to pluck. If you think all tourists who are victimized get press coverage or go to the Mexican authorities... I got gold bricks to sell cheap.
IMO: All the tourist places in Mexico are well soiled in depraved violence. The world's people are getting wise to the happenings in all of Mexico.
P.S. About 3 years ago, I begged my nephews to cancel a planned trip to Cancun. The heeded my counsel and went to Hawaii instead.