Clearly some of you guys don't get it, and I'm not the one to enlight you all.
I just like to point out that both examples given by Hiro are not valids since both fitch and Phil were applauded after the fights.
Have you ever saw a football team geting Boo'd just for having a ball posession? It's kinda like that, it ment to add pressure no one is disrespecting anyone here but you, US fans who don't get cultural diversity.
I'm Brazilian and I'll take heavy boos any day over 'just bleeeeed' fans