These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
Darkness-Induced Audience Apathy: With the exception of Charlie and Laurie (and even they can be pretty annoying), do you care what happens to any of these jerks?
Idiot Plot: Not that said idiocy makes it any less funny, however.
Unfortunate Implications: If this movie is to be believed, the nicest people you'll meet in Mexico are condescending hotel staff (somewhat like the French, only more Faux Affably Evil). All the rest? Anti-American bullies, or state-sanctioned sadists thirsting for gringo blood. ("They'd turn me into a taco!")