Version 2 of the GPL forbids the incorporation of additional restrictive terms, relating to the distribution, modification, etc of the article licensed under the terms.
Those that violate this section are declared, by operation of the terms, to have their grant automatically revoked. An additional term need-not be present in the same writing. Such terms simply need to be present to or made known to the taker(sub-licensee) by the distributor. They may be proffered in writing, orally, or implied in the course of doing business dealings. They simply must relate back or involve the article in question (the licensed code or product.) The proffering of additional restrictive terms is a violation of the text of the license grant in and of itself. Here we have a situation where an additional writing has been proffered. The additional writing promises both in it's own text and by implication consequences against those who violate the terms of this additional writing. The additional writing restricts those subject to it from expressing certain views publicly - promising retribution against those who do. No consideration is paid to those subject to the additional writing for their assent; it is simply imposed unilaterally against the subjects. The violators of the additional writing are promised: Additional, unwanted, public scrutiny (to which they were not subject to prior) Public ridicule. Loss of public standing. as-well as an implied loss of future income. These are the enforcement mechanisms of the additional writing to enforce its restrictions against those who publish derivative works of the kernel. The additional writing is activated when (with the prerequisite of being a derivative work of the linux kernel) the work of a rights-holder is incorporated into the kernel, when such a work is made known to the kernel-team to exist where any one person on this earth has seen fit to present it for inclusion, or by simple prior-inclusion into the kernel. Thus all current and past rights-holders who have code in, or have published for distribution, derivative works of the kernel are subject to the retributive promises made to them in the additional writing, drafted to restrict their actions and utterances. This is tantamount to an additional restrictive term regarding the modification and distribution of works under the linux kernel license grant. It is a violation of the license terms of the rights-holders past incorporated works in much the same way that GRSecurity's Contributor Access Agreement was and is.
