And how, pray tell, do you identify "hate speech"? Who's the judge? You're going to get a different answer in Iran than you do in Switzerland. Not to mention the obvious, that the answer to to speech you don't like, is more speech, not censorship.
Companies already cater to national laws, e.g. Twitter censoring accounts in Turkey on the behest of their government.
In a technological world this just results in megaphone / spam wars, ultimately destroying the value of communication channels. Almost everyone finds a moderated platform more useful than an unmoderated one.
https://www.instagram.com/genderless_nipples/
This has been written up on a few news-sites, for example:
https://www.theguardian.com/world/2017/jan/19/genderless-nip...