Not to be callous, but you're the only person responsible for your safety during a dive. If people didn't dive beyond their training and experience and avoided "trust me" dives there probably wouldn't be so much to read in the accidents and incidents forum.
Wiz
The issue I have with this is in my opinion it's too close to the "blame the victim" type of arguments. It kind of reminds me of blaming the victims of a pyramid scam because "they should have known better". In hindsight, these people look like complete idiots, but they still aren't the ones trying to break the rules.
What I mean is, you're 100% correct that a diver can always say "screw you" to the divemaster, and after the fact it's easy to say "why did he listen to that idiot?". But in reality, especially to people who have maybe never dove before (which I believe is often the case with tropical resorts), the divemaster is the (normally paid) authority figure. Yes, people have responsibilities such as to check their gauges and keep an eye on their buddy. However, when the divemaster assures you that going past your PADI/NAUI/whatever limits is perfectly safe, unexperienced divers will tend to trust them.
The other thing is, in reality it's sometimes difficult to say "no". For example, credit card fraud experts say never let your card leave your site. Yet, we all let the waiter or waitress take our card from us at the restaurant. Sure, if afterwards you find someone just bought a big screen TV on your card, someone can blame you for not following the advice, but the truth is most people are too embarrassed to do what is advised of them. If a divemaster is assuring you something is perfectly safe, it can kind of embarrassing to argue it, especially if brand new. Even worse, if you're already underwater and notice that you're starting to go below 60 feet, now you have to try and stop the whole group while underwater and possibly "ruin" the dive in their minds. It's not a good situation.
So sure technically you can blame the followers, tell them to "grow a pair" and not listen to the Divemaster, but in my opinion the Divemaster is the authority figure and needs to be the responsible one. The diver should be worrying about his or her own safety (and their budies) not worrying about the divemaster's incompetence.
Fortunately, all the divemasters and instructors I've dealt with have been very professional and cautious, so I'm not speaking from personal experience. However, if people can't trust the Divemaster to follow the rules (and not lead his followers into conditions they are untrained for), why even have them?