Earlier quoted context omitted.
(1) According to the article, disabling the wireless camera itself may be a crime in the US. If so, there are a host of ways the participant could face criminal liability under the described facts. (2) Civil liability does require, generally, causation--cause-in-fact and proximate cause. The cause-in-fact test is a simple "but-for" assessment: but-for our guy disabling the wireless, would the robbery have happened? I…
Disabling the cameras would make it much harder to identify and catch the thief and therefore recover the stolen property. And so, on a balance of probabilities, 'but for' disabling the cameras the damage (loss of property) would not have occurred. I see what you're saying, but there's a strong argument to be made for finding the camera-disabling guest negligent. If I was advising a client I would never state things…
A lawyer who doesn't quite yet understand factual causation or the limitations imposed by proximate cause would do well to hedge an answer like this with a client. A knowledgeable lawyer, however, would win this on SJ.
[edits: typos]