OK. But the prohibition is enforced by the patent holder suing for damages. It seems 1) unlikely that the patent holder will discover the infringement in the c

OK. But the prohibition is enforced by the patent holder suing for damages. It seems 1) unlikely that the patent holder will discover the infringement in the case of a DIYer, 2) that they will go to the trouble of suing for damages and 3) that the damages will amount to anything significant.