Personally I am pleased to see even places like Walmart and Walgreens taking such steps. I'd rather provide a simple release form, at least they're not turning their head the other way to people copying yours and my work.
I've had similar situations with things I've shot for friends, a very simply release form was all that was required. I've even gone thru the same conversation once getting a quick print made for myself.
And trust me, 99.9% of the people who work in those places wouldn't know EXIF data if it fell from the sky onto their heads.
I'd stop by to thank them instead of giving them grief.