I kinda get the first bit, but I'm not sure what you meant by employed by law enforcement? Does the police have stereotypes about Linux software?
I think it's referring to a stereotype that police officers are not the brightest, therefore insulting the poster by bringing their intelligence into question.
It may be a reference to Wayland having better security than X, since any X apps can key log, screen capture, etc. each other while this is limited in Wayland.