https://phys.org/news/2018-10-lawmaker-sued-constituents-facebook-page.html

"By banning access to this forum and deleting comments based on the viewpoint of the speaker, Representative Walsh has violated plaintiffs' right to free expression, to petition the government for a redress of wrongs and grievances, and to hear the banned speech that would have otherwise been engaged in, distorting the expressive forum," the lawsuit says.

The lawsuit seeks an injunction requiring Walsh to restore the posting privileges of Nichols and Myers, as well as anyone else banned for their viewpoints, and seeks "nominal damages and compensatory damages" as well as attorney fees.