No peddler, solicitor or transient merchant, unless invited to do so by the property owner or tenant, shall enter the property of another for the purpose of conducting business as a peddler, solicitor or transient merchant when the property is marked with a sign or placard at least four inches long and four inches wide with print of at least 48 point in size stating “No Peddlers, Solicitors or Transient Merchants,” or “Peddlers, Solicitors and Transient Merchants Prohibited,” or other comparable statement. No person other than the property owner or tenant shall remove, deface or otherwise tamper with any sign or placard under this section.