But the student discount isn't a steal like shop-lifting, it's just a sale price. (If you refuse to pay a weekend sale price, but wait until Monday to pay full-price, you're not "ethical," you're just a sap.) The stores don't WANT to be shoplifted from. They actually DO want the student discounts used by people who won't pay full price, even if those people aren't students. (Granted, they won't admit this, because they don't want people to think about multi-tier pricing and what suckers they are to ever buy in at the top tier.)

The key, again, is the student discount is not below cost; the company offers those discounts for sale, makes a profit on those sales; transacting one of those sales with them hurts them in no way. Not remotely comparable to shoplifting.

I will say this, though: if the student discount contract actually prohibits the student from reselling the product (though few do, anymore, since the courts have made it clear this prohibition is not legal), I do not consider the student a sap or sucker for refusing to resell it. Standing by what you sign your name to is an ethical decision I respect; similarly, I would never forge fake school credentials to my name to obtain a student discount. Although I know no one would be harmed or cheated in any way by this, the habit of misrespresentation or signing lies just to make life a little more convenient is too dangerous to pick up.

Still, I stick with my original point. A student discount is not like a handicap parking spot. There's no moral reason not to let a student broker one to you.