My point is, Facebook doesn't allow minors under 13 to register. You're right - those are their terms of service, which are likely based on COPPA (guessing that FB doesn't want to deal with the hassle of the requirements).
Regardless, since Facebook doesn't allow it, we should not allow or encourage Scouts to violate those terms of service (a Scout is trustworthy and obedient, after all). So, if we are living by the Scout Law, then Facebook isn't an option for 10 1/2 through 12 year olds in a Troop. That was all I was trying to point out.