Destroying what? The phone is still there, you just have to install an OS in there or something. A charge with "destruction of property" hinges on the assumption that 1.- there was something in there before the passcode (could have been an empty profile) 2.- that was property (corporate interests insist that our data is not ours, so I don't see how the agent can insist here that the user destroyed his own property, at least) 3.- that was destroyed (which relies on proving point 1).