SOP is correct according to my understanding. My sister went to law school and that's what she told me about it. Frankly no one can afford to sue over the amounts of money you'd be talking about anyway. Also what's legal and what's right are two different questions. I think the makers wishes should always be respected but try to keep the wishes reasonable too.

"Your work is to keep cranking the flywheel that turns the gears that spin the belt in the engine of belief that keeps you and your desk in midair."

Annie Dillard