The number of 'likes' required to trigger a head shave varies quite a bit. I saw one page that was requesting 100,000 likes. On the other end of the spectrum, another page was only looking for 75 likes.
All of the pages I came across seemed to be joke pages, and nobody seems serious about following through. Granted, I only checked out a few, most of which hadn't reached their targets, but even those who had met their goals (like this page, or this one, or the '75 likes' one lined previously) show no evidence of actually having shaved anyone's head.
Anyone know a page of this type where they've followed through? Just curious. :-)