I believe Facebook as Private Company per their Terms of Use agreement can bar any person they see unfit to participate on their Private Domain.
I do how ever Posit the following agrument:
Facebook viewed from a current Context I would suggest a more accurate description of Facebook as:
“A Public Utility”
Similar to Water, Power, Gas, Sewer, & Telephonic Services those would Never UnReasonably be denied any Human Person for all practical purposes.
I speak Truth
As yehovah Lives, so should we