I've been thinking a lot about that lately. I do enjoy my violence in D&D, but I feel that one of the problems in north america is the glorification of violence. Why is batman fighting crime instead of oh, I don't know, using his massive resources to help alleviate societal problems (which often lead to crime...)?
In a recent session, our PCs encountered another group that had an opposed mission to ours - we both needed the MacGuffin, we were both convinced that our cause was right. But despite our best efforts, no agreement could be reached... so regretfully, a fight started, and our party's destructive power obliterated them, making the victory feel even worse...