@GluedToTheScreen fake "Service Animal" apparel the same thing as printing a fake handicap rearview-mirror-hanger as far as I'm concerned, and I've watched people do it with absolute impunity.
On the plus side, the same trick apparently works on the TSA -- you can print "TSA compliant" on your leatherman tool and they'll send it on through.
Behold! The power of words printed on stuff! *cue "Entrance of the gladiators"*