Bus time tables, giveaways and product advertisement are normal things that people are interested in. A train ticket with a QR code is going to be sitting in s

Bus time tables, giveaways and product advertisement are normal things that people are interested in. A train ticket with a QR code is going to be sitting in someone's hand on the train while they've got their phone in the other hand. If they are curious about getting a 2012 games ticket, or if they're just bored they might play with this QR reader thing. A salt package however... Maybe you're in a restaurant, do you pull out your phone? Do you hide away the salt package just so you can read the QR code later? This isn't even described, so why do you want to read it? We already have a ubiquitous machine-readable way of identifying things, barcodes. Just because you own a barcode scanner doesn't mean you go around scanning the multitude of barcodes on your stuff. In fact, we get kind of blind to the number of barcodes on everything because they are used on everything and given without context. If QR codes are overused on everything, maybe leading to things as mundane as an infosheet on salt (oh, this is high in sodium, who knew?), or forgotten broken links, they're just going to be ignored except when given appropriate context. Are "normal" people really interested in getting detailed information documenting the unique ID of the salt package they purchased?