Except they will not let you scan the bar code in store. Coupons are to get shoppers in the store, not to give the store away once they are there. What about a groupon? Just saw this on the news.
Pharmaceutical Industry backs 2D bar code technology
The solutions
The introduction of unique coding for each pack of medicine, together with authentication, track and trace systems and physical security in the form of tamper resistant packaging, would dramatically improve the safety of medicines supply. This involves the integration of four key elements.
phish, I wasn't trying to correct you in any way, just trying to add emphasis to your post which is a great point you've made. [P.S. I don't have the ability to correct anyone on this board.]