In one of the first decisions of its kind, the 4th circuit has held that when a public official owns a FB page to conduct business, contact constiutents, and perform duties, it cannot block critics from posting on that page.

The decision may be found here:  http://www.ca4.uscourts.gov/opinions/172002.P.pdf

Some quotes from the case

Phyllis Randall, Chair of the Loudoun County, Virginia, Board of Supervisors (the
“Loudoun Board”), brings this appeal, arguing that the district court erred in concluding
that she violated the First Amendment rights of one of her constituents, Brian Davison,
when she banned Davison from the “Chair Phyllis J. Randall” Facebook page she
administered. In a cross appeal, Davison principally argues that the district court erred
in dismissing his procedural due process claim premised on the ban. For the reasons that
follow, we affirm.

On her campaign page, Randall characterized the Chair’s Facebook Page as her
“county Facebook page”…