One very easy way for you to protect your and your friend's Facebook data safer is to research who is producing that quiz you are taking or that message you are forwarding.
This is not only a Facebook problem. This is an "Us" problem.
I'm having flashbacks to emails that contain mal-ware being forwarded to everyone either because they are cute, you want a special blessing or Bill Gates is going to give you 5 cents for everyone you forward it to.
It is time for us to get smart about our data.
If you don't know who the original poster was, then don't share. Don't forward it.
It's something I've be saying for a while: Share your ideas, not someone else's.