Just as well to ignore it… Little Snitch's developer is adamantly opposed to any sort of automation, believing that allowing any way to automate the application is a potential security hole that would allow a malicious app to deactivate it.
There used to be a way to turn off the Network Filter using Keyboard Maestro and scripting an interaction with the preferences window, but not long after I wrote about how to do it, the developer changed the window in a way that makes it basically impossible now.
¯\_(ツ)_/¯