I feel for all the good employees who have to be humiliated by having someone jump out of their car, check the pump, scream in their worst Spanish or best English how much they want, that the pump "must" be in zeros, and then have someone hovering over them while they are doing their best job. Then, after all that stress, someone doesn't trust you enough and they have to shake and wave 500 pesos bills in front of you as if you are some type of illiterate.
If you feel you have to do all of this, I wouldn't bother coming because it shows there is little or no respect for Mexican people who are trying to earn a living. If it's just the beaches you're after try someplace like the French Riviera.
JMHO