Not reading error popups is the norm around me, and I work in IT support. It has nothing to do with the message, but the medium: a message popup disrupt the user's workflow, and more often than not for no good reason. All people who work with computers very quickly get in the habit of dismissing flow-breaking popups. I'd say the problem is not with the people.
It's like the ER doctors who miss crucial "Patient is dying!" alarms. They're not just lazy or careless, they work in an environment where every device is screaming "I am here!" every minute of the day.
It's both an important work skill and an unavoidable physiological response to tune out obnoxious and unimportant stimuli, to the point where the people abusing those signals ought to be accountable.
You had something similar that resulted in a mid-Atlantic plane crash some years ago. The crew got so blanketed by automated warnings, and didn't have any visual cues thanks to being a night flight, that they basically flew the plane into the ocean.
Pilots are repeatedly taught to never "silence" the annoying warning horns that come on for different reasons (slow speed, wrong landing gear configuration). The idea being that mindlessly dismissing alarms will build a bad habit pattern. Especially when you're actually in trouble.
