Hate speech is also a rather nebulous concept.
Re censoring online speech and social media, it needs to be resilient, to avoid unnecessary censorship it does not need to be on the blockchain, it needs to work with the blockchain. The actual content should be distributed, bit torrent style, all over the world but hashed into the blockchain for authenticity. In principle, it works like a blockchain, the data always somewhere available for review.
In the
4th age of sand (TL;DR linked but the full speech is worth the read) technology allows for a new way of communicating in this age it's many to many communication, and with it comes a new form of government like every age of sand before, most are clinging to the ideas of the post-WWII many to one and one to many forms of communication.
Hate Speach is largely defined by those who feel there is nothing wrong and don't actually seek to understand. It's projected onto those who know there is something wrong and who experience some injustice but can't actually quantify what it is. Hate speech is the label one gives to people who incite others to the cause of blaming for the injustices, Hate speech is just words reacting to a preserved injustices real or not that have gone unaddressed.
The principle that injustices anywhere is a threat to justice everywhere is the magnifying glass through which incitement and intolerance are fueled. Speech is merely the first non-violent expression. Grievances no matter how they are expressed should be aired, not repressed. They should not require a formal legal system often inadequate as it's not forward-looking or proactive, not to mention that it's not practically available to the masses, and when it is it almost always rules in favour of the way things have been.
Situations escalate when everyone ends up in a blame culture (an authoritarian culture cultivated by people acting as a single world superpower)
The way out of the escalation of blame that ends in physical conflicts is to realize one can never change things by fighting the existing reality. we need to
build a new model that makes the existing model obsolete.
If we don't, we the people end up burning down the casino and the house just builds a new one in the same image as before and the game continues with the same Martingale strategy rules in favour of the "new" house.
Idea credits go to Douglas Adams, Martin Luther King, Buckminster Fuller and my nursery school teacher who managed to teach us that sticks and stones may break my bones but words can never hurt me.