Walgreens demands personal data for photo processing?

Boing Boing reader Andrew Kantor says,

We bumped into a rather surprising policy at Walgreens. Apparently, to get the photos you print from the stores' self-serve kiosks, you must provide your name, address, and phone number. You take your photos with you, so they can't claim to be doing it for "safety" reasons. So WTF?

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Reader comment: David says,

I worked in the photo lab at a Best Buy this past summer, and our self-serve kiosks also asked for name, number, address, and maybe email address. The machines themselves would force you to enter something for name and phone number, but the rest you could leave blank. I can't speak for Walgreens, or the people who designed the photo labs for best buy, but the only use for the name and phone number I ever had was to be sure I give the photos to the correct person. Maybe they would have been used differently if someone gave pictures I wasn't allowed to print (penetration), but I never had that problem.