He did put down Rachel Grey when she attempted to do that once though.
Wolverine set about chopping bits off that guy who killed Mariko. He came back once a year with no other purpose than to chop off another of this guy's fingers. As time went by the guy's face got disfigured pretty badly...
I found this totally unacceptable as a side of wolverine's character. Sure he will kill and he may even have some history of torturing for info, but this was something else.
I hope this never comes back to the surface.