get a little ziploc baggie the license will fit in, and glue some black paper /tin foil to the ziploc over where the bar code is.. This way, you haven't altered the license. you're just making it impossible to scan w/o removing it.. that'll give you time to say HEY, WTF are you doing? when they try to scan it. Mine has a funky bar code... it's not stripped like a regular UPC.. thick vertical black bars at the ends, a few consistent thin vertical black bars in the middle of the field, and what looks like 'binary snow' everywhere else. edit: turns out it's the PDF 417 code? http://en.wikipedia.org/wiki/PDF417