In 2007 Israel began deploying remote-operated sentry guns along the border fence separating it from the Gaza Strip. That same year South Korea announced it had plans to install sentry guns along the Demilitarized Zone (DMZ), the no-man’s-land dividing it from North Korea. Those plans were delayed for a few years, but North Korea did begin using sentry guns along the DMZ in 2010. The use of these remote-operated weapons systems has stirred some controversy, and it’s also proved to be lethally effective.
I did some research on RWS a couple years ago and was gobsmacked to discover the number of vendors and product offerings available, as well as the level of improvisation. (the fun starts at 1:00) For years, I grew up thinking the East Germans had autoguns on the Berlin Wall. Turns out it was effective propaganda.Although referred to within the Border Guards by the National People's Army designation G-501, for propaganda purposes the mines were referred to as "Automatic Firing Devices" (German: "Selbstschussanlage") in public documents. The cryptic description led to the public perception that the mine was a type of automated sentry gun (rather than a simple static trip-mine), a misconception shared even with Western intelligence agencies. In fact, no such technology existed during the lifespan of East Germany, and the mine was actually more similar in capability to an oversized spring gun, but the rumors provided an additional psychological deterrent to would-be border crossers. From 1973 onward, the mines were enclosed in a plastic box housing for protection from the elements, further concealing their design from onlookers.
I guess if your spec is "shoot anything that moves" there's no need to worry about shooting the wrong moving thing. Wonder how long it'll take for a fork that drives a real gun to show up on the walls of a gun nut castle.