So Punisher is a guy who could easily sub in as a villain for many other heroes (and in fact from time to time does so) but he's still fairly easy to root for as a good---ish guy because everyone he kills is either trying to actively kill him or is a serial rapist/murderer/pedophile/all of the above.

My question is has Punisher ever fucked up? Has he ever accidentally killed someone innocent, or even someone who may have been a criminal but not necessarily deserved to die? How did/would he react? How would other heroes react?

Not trying to make some kind of bash the punisher thread here by the way, I'm just genuinely curious as someone who hasn't read a whole shitload of him.