I kept myself too far away to know whether it opened fire or not so I'm not going to comment on that.
Cross RP that involves breaking the rules, especially from an official faction to a non-official/indie with potential shaky understanding of the rules could result in disaster. That's a Pandora's box you don't really want to ever open. The entirety of Tau 23 wouldn't have been warned if everyone their had a firm grasp on the rules.
Also by your thought path:
101st going "hey you, indie Storta pilot, kill this miner if he doesn't drop his ore in ten seconds" is ok by you.
It might just be RP and a bluff until that one time a miner catches a LM with his shields.
That's a slippery road I don't want to see any official faction to go down; be they lawful or unlawful.