I dare say quite a few of us here could work out how to do that, given a while and adequate coffee.
Well yes and no. If a burglar sees an apparantly stout safe they may well decide to bother other bits of the house - or other houses. They'd probably never know the back's off. Where does active become passive? In the end it's almost all down to perception of difficulty - even very sturdy defences can be breached in the end.