Also, how many times have you seen someone's fly undone and very quietly and unobtrusively informed them of the fact? You can get quite different reactions, eve

Also, how many times have you seen someone's fly undone and very quietly and unobtrusively informed them of the fact? You can get quite different reactions, everything from grateful thanks to "how dare you inform me that I am embarrassing myself" or just be ignored. Different people will react differently to any help you may give them. In this case, one could possibly agree that getting these machines locked down so they longer present as a threat to others is the moral thing to do, irrespective of the legality of the action. But that is a judgement call for the individual to make knowing that there are potential consequences for their actions.