Thinking about fighting crime in the street?

Alright, so i can't deal with this anymore. l mean the crime rate in my city is constantly increasing. l mean a few days ago a man got shot , recently a man was beaten to death and was robbed and just yesterday my uncle got robbed. Police doesn't give a damn about any of this. And i believe that someone should take a step up and do something about it, even if thats me. So the whole point now is that i am thinking about becoming a Vigilante. l know vigilantes are a threat to the law and they pisses the cops off too.
Now i know some athletic moves. SO i am thinking of wearing a suit, having my weapons with me and going out there. Ofcourse i will try not to reveal myself to the public(because that is gonna put me in danger).
What do you think about it? i know it sounds crazy as hell but l am willing to put it all on the line.
So i need you guys on this one? what tips and advices can you give me?