Every single time you're in Alterac Valley and your faction starts losing, someone starts whipping out the blame. Unless you ignore the battleground channel, you will be forced to read all about how you suck, how everyone else in this battleground sucks, how you should have done what they told you to do, and so on. Then, the other guy will pipe up with something like "would you shut up, dude? It's just a game," which sends the first one even deeper into his rage. Eventually he may just leave the match, or else quiet down while someone starts a chorus of "Guys, just let them win! I want to get my mark and go home."
Personally, I'm a proud believer in the power of reason. Every time this happens, I find myself giving helpful suggestions, calming tempers, offering insights on how we could improve next time, and generally trying to play the peacemaker. Sometimes I can even find a strategy I think will turn the tide in our favor (and sometimes it works!), but usually I count myself a victor if people just see reason and behave civilly.
What's your experience of people in battlegrounds who just can't handle losing? Have you been able to contain their blame explosions?