Makes ya wonder if the "offender" felt that he (I'm assuming here.. safe assumption, eh?) was above rules and regulations, or never read the dialogs to begin with.
From what I've heard from folks in the healthcare industry, there is a certain class of employee in that environment that has that exact opinion of themselves. He did actually have to click on the dialog to dismiss, but it very well could have read like "blah blah blah, IT blah blah, yeah, whatever." There has to be "that guy" in every environment, I suppose.