Wouldn't it suck? (http://www.wired.com/news/technology/0,71521-0.html?tw=rss.index)

"Using a mockup e-passport modeled on the U.S. design, they showed how an attacker could connect a hidden, improvised bomb to a reader such that it triggers an explosion when a passport-holder comes within range."

Oh boy, I'm feeling safer already.

If you recognize its limitations, and use it with the understanding that it's for convenience and not security, then it's a good idea.