Why so many angry audiophiles?

I imagine it's the on-line thing.  But let's take a poll:   we've all gone to a friend's house to listen to their system.   And most of us say, "That sounds great!" no matter what we think.    SO:   how many here in that situation have given their friend sh*t or called them names because, say, they have lamp cord for speaker wire, or they just invested in an $8K power cord, use cd's rather than vinyl or have their speakers positioned incorrectly?

Years ago, I was at a Dodgers game with a good friend.  The pitcher threw a curve ball.  We immediately began to argue:  "What??  How could you POSSIBLY throw a curve in ..."  "Wait; you HAVE to throw an off-speed ..."   This was amusing for about 30 seconds.  Then we looked at each other.   End of argument.   We enjoyed the rest of the game.   (If we hadn't been face-to-face, I imagine we'd still be reviling each other.)