Does the administrator of the community have the right to clean up other people's billboards as garbage?

Owners put exhibition boards in the community to slander the property company, and the security of the property company needs to be cleaned up immediately. The patrol security guards of the property company should take photos and report to the security foreman immediately after discovering the billboards placed by the owners to defame the property company, and then clean them up immediately. If the owners slander the property company out of thin air, they need to bear certain legal consequences.