I've just finished reading Linus' blog post entitled Black and White and I have to agree.
It's not productive to be anti-something, it is much healthier and more productive to be for something.
I think Linus' article ties back into the How To Survive Poisonous People presentation I linked to and commented on back in June.
Very often times, the poisonous people in a community are those who try to make everything black and white and typically take the anti approach to things.
We all do it from time to time (myself included, *cough*), but the truly poisonous people are the ones that can't ever let things go.