No person shall prohibit, bar, or interfere with, or attempt to prohibit, bar, or interfere with, reasonable access to, or egress from, the grounds of any seasonal farm labor camp by a privileged person, either by the erection or maintenance of any physical barrier, or by physical force or violence, or by threat of force or violence, or by posting, or by any order of notice given in any manner.
43 P.S. § 1301.402