There are several tenants leasing space in a building open to the public. Tenants have requested a buzz-in system to enhance security. Landlord refused. Yesterday, building was evacuated for a bomb threat. Landlord contacted by phone and notified of bomb threat. Landlord was asked again about installing a buzz-in system. He refused stating "It's not my fault that you people have enemies crazy enough to make threats like that. The building already has security (not exactly true) and upgrading what's there is not within the scope of a normal landlord's duties." Is this outside the scope? What, if anything can tenants do?