This dude doesn't understand what a CAM table is, so I feel like this quote is just laughing at an idiot who thinks he is smart. Which I'm not necessarily against, but then you have tons of people in the comments who are "good with computers" who don't understand it either. the tl;dr is that this guy doesn't have a clue and anyone who is "looking for a computer" without logging into the network infrastructure to find the MAC is just an idiot.