What happens if someone breaks the Netiquette guidelines or social rules?

What would happen if someone was to break the Netiquette Guidelines or social rules?

Anyone that is caught violating Netiquette will be banned from the site.
it's necessary for online communication safety because if i victim is being threatened or harmed over the internet and there's no one enforcing the websites' rules the threatening will just go on-and-on for who knows how long. But if there's a prevent situations like this then people will feel safe and secure on the web. The people that violate netiquette will find themselves banned from the site. 1 person that violates netiquette banned means 10 -15 people saved from things like this.