Devil's advocate: I want to use your technology so I create another company to develop an infringing product and sell it to me cheap.
Putting aside stuff that shouldn't be patented: 1) Selling a product with someone else's patent seems like something that should be discouraged. Giving it away counts here, as do other distribution methods. 2) Making your own product, for your own use, that someone else has a patent on seems perfectly reasonable and should be legal, in my opinion as a layman.