I don't subscribe to that email list but the current GPL licence changes relating to Linux have been mentioned in the current Joomla discussions regarding this issue and I think it was actually one of the things that triggered the idea behind this issue now being discussed regarding Joomla licencing.

It definitely would not be good to restrict Linux in this way. It would definitely be the slow death of such a great open source OS. Commercial models such as RedHat currently work perfectly alongside completely free open source solutions such as Fedora Core. Both of those work hand in hand, but with Red Hat having the corporate paid support it needs. It they were to enforce such changes in the GPL licence then it would be the death of such OS's over night.

Either that or it would fragment the code base with some moving their code away from the central Linux community and developing their own OS that is closed and not part of the whole community and charging what they liked for it.