Here is my concern. Even in writing the previous sentence, only half-jokingly, I wonder if/how health insurers can/will infiltrate social media. It's only a matter of time. High school seniors are well aware that colleges now may Google them only to find photos of their junior prom drunkenness or a crazy escapade one night. The information is out there and its free. Be careful what you share.
What, then, about health insurance? If you fill out an application stating you have no prior conditions, but the insurance company looks at your Twitter feed and sees that you had 2 migraines in the last month, what then? What if they look at your Facebook page and see you have a penchant for skydiving and bungee jumping? Will they still insure you? It's not on your application, but the information is out there.
If you have any stories about this, pro or con, I'd love to hear them!