Fight stupid with stupid.
In this case, random copypastas are one thing that works well. Wastes their time, and communicates the fact that you think they are stupid. *cue Undertaker copypasta*
Also, would be great if every community had the tiananmen copypasta stickied.
Yeah, that's a company server, specifically for the local network group
Why would an internal server change IP all the time? DHCP is for silly things like laptops that turn on and off eleventy times a day