Hackers are trend setters on the web. Watch them.
I also predict Facebook would be wrong on that point... hackers and other "hardcore" insiders are most often, as another poster has said, trendsetters. It's well known, for example, that hardcore gamers drive an impressive portion of sales to casual gamers - they're the ones that spread the buzz, or in this case, anti-buzz.
Time will tell if this is the beginning of the end for Facebook (I suspect not), but this whole privacy fiasco is going to be a bit more than a blip from a tiny vocal minority, that's for sure.