I'd agree with the thought that "No one is to blame" in starting it, but it seems most of those involved are more then happy to jump into anything that looks like a fight, take anything as an insult and retaliate.
If even seemingly rude, crass or hostile responses are ignored or replied to civilly, most of this would be nipped in the bud w/o moderator intervention.
Remember, it takes two to tango...:swords: