"Vld1977" I understand that you followed protocol, and took the most security conscious method. However, what did you achieve from the way you handled that situation? Could you have handled it better, and educated the passenger at the same time?
Unfortunately for many of the infrequent passengers, travelling is a highly emotional and stressful time. They are exposed to an environment that they are not familiar with, they hand over control to someone else, they are following what may seem like an endless list of rules, and I can see how it can become very easily confusing and disorientating.
Emotions may be high because people are leaving family behind, or heading to a funeral etc, Overseas workers may be heading to a new job in unfamiliar surroundings where they could be working away for years at a time. They may all have something preoccupying their minds. You can have people who don't speak English and may have been in a shanty town somewhere remote a few days earlier and may be just overwhelmed.
It's very easy to lose sight of the fact that whilst you have many frequent travellers who bring their own problems, you have a lot of people who travelling is a very stressful means to and ends, and thus it becomes easy to understand that they do strange things.
Some flights, in some countries, it seems the norm for everyone to get up and open the overhead lockers whilst taxying to the stand, and the CC don't take any action. If English is not their first language (which can be expected for people travelling/transitting), then they may be not understand what is wrong with the situation.