If you are upset about an interaction between a CEO of a company and a customer of the company, as in this thread, then yes that is the kind of thing we have laws for.
In the other examples there are other levels of "government" that have "regulations" that are more official than nothing that you could lobby. You could get GitHub to change the ToS to require CoC, or Twitter to ban certain kinds of things artists don't like, rather than just be personally mean to other users on the site about it.
In the other examples there are other levels of "government" that have "regulations" that are more official than nothing that you could lobby. You could get GitHub to change the ToS to require CoC, or Twitter to ban certain kinds of things artists don't like, rather than just be personally mean to other users on the site about it.