Not all people. Submit your List, Website, Bulletin Board or Newsletter today. Free monthly giveaways. It's certainly possible to draw up a list of generally accepted standards for the behavior of listowners. My contention is that, unless it is both narrowly drawn and objectively based, a lot of people are going to ignore it completely.
Some people prefer more precise and explicit rules, to avoid arguments.
And in some forums, such explicitness would be advisable. I would argue yes. I think so too. Still, the excercise seems worth doing. List owners should not use SPAM to promote a list.