Taking a photo with a camera phone is the new quick note in your handy little memo book you keep on your person at all times. When my son was in the hospital, the staff constantly took a photo of the whiteboard where his daily orders were written, or a photo of his medication bottle, photos of everything -- it's quick, it's accurate, and you have an automatic time and date stamp, as well as location, often.
Camera phones are here to stay, and people will continue to find ways to use them in all areas of life. It's smart to figure out how to make that a bonus for your business or your personal life, rather than being reactionary and trying to keep people from using their new tools. If I had a store, I think I would deliberately put scanning information into place as a service. Love this line? Scan the QR code to link to an online pattern and tutorial. Scan here to see customer quilts made with similar lines. Enter your quilt or work in progress in our photo gallery for a chance to win a free prize.
There are many ways for brick and mortars to take advantage of the technology and turn it to their advantage, but it requires stepping out of the "this is how we've always done it" minset.