Facebook posts are not legally binding:
Chris Taylor hopes to prevent future Facebook scams:
[T]his has to stop. We need a centralized system to alert and control these outbreaks before they take over everyone’s Timeline — a kind of Centers for Disease Control of the Internet. Until that happens, we all have to take responsibility for prevention and containment. If you’re not involved, if you sit back and let scams spread from Timeline to Timeline, you’re part of the problem.
Among his tips:
A post of your own, warning friends of the danger, will go a long way towards containment. Enlist them as virus fighters. You are the white blood cells of the Facebook body. It’s up to you. Facebook itself doesn’t have the resources or the inclination to clamp down on scams, untruths or chain letters as fast as you can.