“What would happen if someone made an official “militia” for the purpose of having GGWGs at all places that are at risk?”
You mean like an umbrella organization that puts armed guards at all shuls and schools? I would imagine if one organization got big enough, it would be regulated as a public utility like electricity and become sort of a secondary police.
There are already private armed security services that many shuls are already utilizing. What would be different about what you’re describing other than the arbitrary use of the word “militia?”