Maybe it's the graven image aspect of the thing. Once you have copied (or printed) a document you have taken part of its essence, and it is changed forever.

I'm kidding, of course. Seriously, I don't think there is a way to stop the behavior you describe. One of my pet peeves is the number of routine and meaningless advisories that pop up, getting users in the habit of clicking through every error message, question, or notification. Then one day a message is of real consequence, but you click through it like the 99 messages that came before it, and bad things happen.

I hope I'm wrong that there is no way to stop this, but in the past I have spent some time looking into it and have come up with nothing.