"not be a form of vigilantism"
Written as if that were a bad thing. Definitely better than to assume the party escort submission position and wait for the guys in blue.
And I cite Wendy McElroy:
"Officials in the UK, as everywhere, pronounce the word vigilante with intonations of horror and disgust. To them, a vigilante represents 'society gone askew' every bit as much as the looter who smashes open windows, because both men constitute a basic denial of the officials' authority. No wonder the police are eager to portray those who protect their own persons and property as 'lynch mobs' or otherwise threats to civil society. If a trend toward self-defense were encouraged, after all, then the police might be out of a job; the authorities might be out of power. And so, vigilante is a good word that has 'gone bad,' largely because the authorities fear its virtues."