As a physical security integrator, I can state with confidence that most physical security people are just like most HVAC installers in that they have no freaking idea what they're doing on a network. IP cameras came along and offered substantially higher resolution, easier transmission, PoE, and other benefits, and now you have a bunch of old-school alarm companies with little idea of what even an IP address is installing critical physical security devices with no consideration given to network security. Mark my words, this is going to be a huge problem.