Burglary! The pieces holding the locks on the old units can easily be pried off since the "wood" they are screwed into is really just a cardboardish particle-board. My parents' unit was burglarized last night. The police told us that there are constant burglaries there. Evidently the owners are not interested in changing the structure of the locking mechanisms to prevent burglary. And moreover the owners are not answering their phone, and don't have an emergency number. So there are a good dozen affected units that were likewise burglarized last night, similarly unsecured. The owners should be flogged for failing to take the necessary precautions since they know that this is a flaw in the units.