Because it respects property rights and does not infringe on the 2nd amendment. The 2nd amendment does not give you the right to trepass. If I throw you off my property for any reason, you can not trump that right unless you are talking public or private neccesasity (safeguarding human life, preventing further property damage, etc, etc). Your lame attempt to claim that I cannot refuse you entry on my land because you are armed, have short hair, wear glasses or anyother reason does not fly. Property rights do not trump civil rights, but your civil rights grant you or anyone else the right to trepass....