Sorry for misreading you and making assumptions. Can I ask why you are more concerned about Facebook having your workplace's information than your own personal information? Assuming that your workplace chose to offer their information up to Facebook by subscribing to their service...
I would not be concerned about them having my workplace's information if they did not have my personal information. I'm fine with them having personal information, or workplace information, but not both. The only thing missing for Facebook then would be to watch me while I sleep.
