The real problem here is not companies abusing the GPL (good luck with that), but grsecurity not being integrated with mainline after more than a decade.
You see, if Spender really cared about security he would work with the kernel developers in order to get grsecurity into the kernel but of course being such a famewhore, he never did that. Everything is fine as long as he is the center of attention, actual security be damned.
Spender: I among many have little sympathy for you, you've long exhausted our patience with your antics. Grsecurity is a niche project with minimal actual security impact in the "real world", all because of the deranged way you choose to manage it. Your primary concern, your _ONLY_ concern should be getting grsecurity into the kernel, not companies ripping you off, not companies abusing your trademark, not companies "not playing nice". In the grand scheme of things, these are irrelevant.