The landlord can attempt to fine each of the 12 tenants in the complex $75.00 for what happened but legally the fine is meaningless for the simple reason that it is an indiscriminate penalty as to all tenants for the acts of some unknown person who could live in the complex or not.I would write the landlord a letter stating that you will not pay the fine and the reasons for the position. If he or she presses you on the subject, I would contact the local landlord tenant clinic in your neighborhood. Better yet, I would try and get all tenants in the complex to follow your example.