<a href="http://blogs.independent.co.uk/independent/2008/09/cyberclinic-ign.html">Cyberclinic: Ignore popups at your peril</a>

Genuine warning boxes pop up on our computer screens for a good reason. They interrupt the scintillating on-screen action to tell us that we should probably read the contents of the warning box and consider the various options (usually yes, no or cancel) before we proceed any further with our task.