8 : Audience Apathy
Here's a picture of me watching Asian Dub Foundation supporting Radiohead a few years ago.*
I know most support acts are rubbish but at least come to that conclusion by actually watching them (As it happens Asian Dub Foundation are an awesome live act). I hate watching a band only to discover that there's nobody within a 100 mile radius of me because no matter what you do you just look sad & pathetic.
* A reconstruction of it anyway