i know a i made a lot of retarded threads today, but its all in good fun. i do have a serious question. my girlfriend lives with two female roomates on the second floor of a two family house. the landlords daughter lives downstairs. the landlords kids have been using the attic(which is part of my girlfriend apt) as storage for their baby stuff. which is understandable. today, the son in law, came up stairs to get some stuff out of the attic, and let himself in. useing a key that he has, probably from the landlord. offcourse my girlfriend was home and flipped out at him. now my question is this. is it illegal for someone other then the landlord to come into their apartment, or even the landlord without knowing about it prior to them walking in the door. and, is it illegal if my girlfriend were to change the lock and not give the landlord a key?