Every time a person gains physical access, the worst-case scenario is that it's someone skilled at such things. The reality is that the number of people with su

Every time a person gains physical access, the worst-case scenario is that it's someone skilled at such things. The reality is that the number of people with such skills is rather small when compared to the general population. What are the chances that someone with momentary access will be an ultra-skilled black hat? Do you not lock your house at all because the worst-case scenario is that the burglar is a master lock-picker (and you can't afford the ultra-expensive takes-30-minutes-and-powertools-to-break locks)? Using the worse-case scenario to guide all of your decisions makes more sense when the threat/attack is coming form the Internet, where the likelihood of the attacker being skilled significantly increases.