I'm definitely not defending this woman, as she was wrong in flagrantly using these devices when the "rules" say she shouldn't. And yes it is upsetting when you follow the rules and someone else doesn't.
But I think part of the problem is that we "Frequent Flyer's" have trouble believing that these devices actually can cause harm to a planes electronics and that 4 oz of sunscreen is dangerous and 3.3 oz is not. And as such some people tend to feel the rules are wrong and ignore them. Maybe if we felt the "rules" really protected us and those around us, we would take them more seriously.
BTW I do turn off my phone when I'm told, not use my computer until allowed and I haven't smuggled any contraband through security, although I do wish I could figure out how, as one quart baggie is just not enough.