I share a hatred for this sort of thing that happens all too often the closer you get to hardware, mainly as a byproduct of the culture. However, refusing to adhere to a proprietary license damages respect for all software licenses, especially the GPL, in the global software community. Depending on where you fall on the anarchy vs rule-of-law scale that may or may not be a good thing.

Flip side of the argument: "Someone wrote a GPL library I want to use but I don't want to release my source. Is anyone really going to notice, care, or bother to bring the hammer down on my company?"