A friend of mine stunned on some occasion a coupon for a free small pizza when ordering one big one. Come there and give the right to download, say give it just so, it is written "one for free", and with a small letter by star "when ordering big for money" it is they do not have the right to try to fool him so and he will complain. Those decided not to bind and gave him a free pizza, the result - two weeks in the infection with diarrhea.