Yes, I know it's Tony Daniel writing this (from Detective Comics 6), so it doesn't really count in some people's view, but didn't we just go through a phase not all that long ago where Batman became so dark and all, eventually resulting in the Brother Eye fiasco?
It seems the Batman I use to remember would have found a way to knock the gun away so that neither Batman nor the desk clerk would have been severely injured by the shot gun blast . . . shooting off "all the toes on his left foot" doesn't sound like an injury he'll be able to recover from after a few days in the hospital.
But, I'm probably just old and cranky, and their are a bunch of readers who likely think Batman is coddling the criminals by not being tougher on crime. (After all, they keep breaking out of Arkham Asylum because he won't resort to lethal force.)