The Internet is composed of a LOT of small communities. Just as each offline community has rules, and the law recognizes the concept of both universal and community standards, so do netizens. As a personal thing, I have no use for the concept of community standards offline. If you don't like the rules in a given neighborhood, there is nothing at all stopping you from moving, or even creating your own specially tailored neighborhood. There are over 100,000 of them now, not counting web sites and chat channels.
Diversity is good for everyone involved.
It's important to understand that netiquette is not the static and outdated set of concepts that a lot of people would like you to think. It is the full body of behavioral norms that are required in order or the net to continue to grow and be of use. Thou shalt not unnecessarily consume excessive public resources. Thou shalt not forcibly interfere with the rights of others to exchange ideas freely within subject-specific areas. The interpretation is often strict.