I've known about this for awhile. I forgot the left-wing activists name, but he made a concerted effort to (for a while) make his "definition" the number 1 spot on Google. He understands how to manipulate Google's search engine to get top spots and in this case he succeeded. Though it sounds like with the presidential primaries he's lost his place.
I understand disagreeing with somebody's stance, but this, in my opinion, is a form of cyber terrorism directed at an individual, and designed to shut down free speech, not encourage public debate. If nothing else, it provides ammo for those who disagree with same sex marriage to color the entire movement by using this kind of activity as examples of how "we" operate.