I disagree.
It all sounds very laudible - these guys turn over their evidence to the police blah blah, but where do we go from there?
Next, we have a slightly more excitable bunch who don't hand their evidence over, they break bones with baseball bats instead.
Then the psychos move in, and it's a bullet behind the ear.
This is always the danger with unsupervised self-set-up gangs - what starts out as an apparently workable public service becomes carte blanche for the headbangers to steam in, and innocent people start to die.
So no, I don't agree with what the man is doing, although I do understand his motives, and frustration with the system.
The system is flawed, of course it is, but unelected self-righteousness is always going to end in tears. Best not to start that ball rolling.