Concert Goers' Bill Of Rights

If you're in the audience at a concert (any type--rock, rap, classical), what should you demand of the sound system?  Here's my list, what do you think? (I'm trying to keep this simple and clear, and not use technical language).

1. You should be able to understand the words.
2. You should be able to clearly hear every instrument/sound source on stage.
3. You should not have to endure painful levels or have your hearing damaged.
4. You should get decent sound no matter where you are sitting/standing.