friend i know it will break yr heart to believe this but u know what? there are things called night latches? when u close a door while leaving a flat the night latch automatically gets locked and it wud appear someone has locked it from inside.. never saw a night latch? and even a heavy object can be thrown into an indian style servant's latrine dear! it can washed down after that! sorry to dissapoint you on yr fantasy trip pal!
