Of course I would buy it, if I liked it. I usually don't buy new products though, as I have those I am happy with. I purchase products because of the product.
As I said, I'm not a huge fan of boycotts, but still I'm surprised that not only would you buy it, but that you find the decision to send money to Michael Moore such an obvious decision that you add "of course." I'd guess that the overwhelming majority of FReepers would have a different point of view, not that you're not entitled to yours. Of course.