Nope, I spared his life, then saved his butt from the Legion. I loved him from the moment he shot me in the head. Maybe I'm messed up, but something about him is just really charming to me. Besides, I was never really interested in revenge to begin with.
I mean, why should I? If I'd gone through the Goodsprings quests and gotten emotionally attached to those characters and he'd gone and shot up the place killing everyone from Doc Mitchell to Sunny Smiles, then he'd be getting that lighter somewhere extremely uncomfortable.
But, all he did was shoot my idiot PC who has no past and no personality and no reason to live except to follow other people's orders. And he did it after saying some pretty fricking epic stuff in an awesome voice with all that adorable slang-- waaaait, I'm seeing why I can't kill him now.
...stupid sexy Benny.