ya know, I used to be that way, wouldnt do anything "wrong" for any reason, but in my very own life Ive seen people I care about dearly get hurt, one get dead, because I valued my morals more than I valued them. I am very much of 2 minds about these types of situations. if you can put a stop to something before it gets bad, is it worth taking semi-drastic action? I dont know, maybe? I dont have all the answers, best advice I can ever give is, there is no perfect advice for any situation, its up you your and yours to do what you think is best, then to hope it ends up being best.
So, the question is right smack in the middle of that,
if you can put a stop to something before it gets bad, is it worth taking semi-drastic action?
There's a big difference between taking preventative action to defend yourself or your loved ones from someone you know to be a threat, (especially when the law is in no position to help until it is too late, as is often the case) and exacting vigilante justice upon people you do not know because you disapprove of a crime that they may or may not have committed, which is the attitude that is being criticised here.
Your question is nigh on impossible to answer comprehensively though because every situation is completely unique. What could be acceptable in one case might be a complete overreaction in another. So is it worth it? Maybe, maybe not.