Looks like Google agrees with the vast majority of us as it pertains to Facebook's insane policy where they will allow you to import the data of your contacts, but refuse to let you get that data back out of the service. When you attempt to export your contact data from Google to Facebook, you get the warning above, where Google lets you know that once you export your data to Facebook, it is stuck there, and that they "strongly disagree" with the practice. They don't stop you, of course, but they do make it known what's going on, while Facebook tries to hide it.