We use facebook all the time in my bank to check on fraud/claims of stolen credit cards. Once a customer claimed a stolen card but it was used every day at a specific parking lot. Said customer would post "Checking into work at xxx" every day on facebook where the specific parking lot was xxx's parking lot.

Needless to say I don't have a facebook account or post anything using my full name anywhere public.

The scary part will be when the insurance companies buys a direct feed into private posts from facebook or google sometime in the future.