If Frank Castle existed in this universe, he'd decide for himself what he does! Who died and made you head writer?
And read Welcome Back Frank. Payback is a character who pretty much did exactly what you're talking about and Castle was having none of it, killed him and ALL the copycat vigilantes who thought they knew what the Punisher was about.
So understand: you don't! It is canon. People like you are written into the Punisher storylines as villains, not heroes.