In practice, I am staunchly against it. I dunno, something about megacorps patenting their seeds in such a fashion that farmers aren't legally allowed to plant the offspring of those plants. Or maybe monoculture crops, just waiting for one pathogen to wipe out a staple. Or crops leaking strange GM-induced pesticides. Yummy.
GMO could be cool, and a boon to mankind. However, the current practices involved with genetically modified organisms are shockingly corpratist, and dangerously unhealthy, to human biology and economic stability.
There's my rant.