Forcing them to maintain their own kernel fork will incur additional financial expenses - not least in the form of a developer's salary - so it is, in essence a

Forcing them to maintain their own kernel fork will incur additional financial expenses - not least in the form of a developer's salary - so it is, in essence a fine. Will it be enough to force them to stop fucking around? Probably not, but it's one more paper cut, and perhaps in the process of their fork they violate the GPL in a more openly and legally actionable way