Good observation. This is similar in concept to the multivariate analysis I use with quantitative data for my dissertation. I'd bet good money that when studying boarding procedures, airline factor in that there will be X percentage of "pond scum" who think that rules don't apply to them.

Of course, sometimes a little knowledge sometimes is worse than no knowledge. In complex systems, what seems reasonable sometimes is false, thereby making the actions of a "devil's advocate" opposite of the intended outcome. Classic example: Adding a lane on a crowded highway could make traffic worse due to latent demand.