The BSD vs. GPL, which is more "free" or "permissive", argument has been going on for decades and is not going to be settled in this thread.
Can you not see that no one is changing anybody's minds here, and everyone who is chiming in has a fiercely held position? This is one of the classic hacker flame wars, and flame wars are a waste of everybody's time.
In short: Arguing about GPL vs BSD is a shitty thing to waste this great community on, and I felt like it was worth risking the ire of all the people who love flame wars in order to say so. The guidelines exist for a reason (and this thread is more evidence that this particular guideline is useful and relevant; if pg didn't have this particular argument in mind when he wrote it, I'd be moderately surprised).