Google Glasses (and the competitors) might make QR codes very popular soon. Your camera will always be on and picking up any codes it happens to cross. This obv

Google Glasses (and the competitors) might make QR codes very popular soon. Your camera will always be on and picking up any codes it happens to cross. This obviously eliminates the first friction point which is taking out your phone and pulling up your QR app. But, the more I think about this the more I'm afraid for this. They could essentially act as real world cookies. They could track everything you've glanced at and be used to bombard you with ads or other things. I'm sure there will be resistance and then QR scanning features might be turned off by default. Then we're back to no one scanning QR codes.