Substack offers further clarity on its content moderation guidelines, detailing its stance on harassment, doxxing, hate, and more
Hamish McKenzie / Substack Blog : Tweets: @adders , @alexhibbert , @aaronhuertas , @guillermokrh , @kirkegaardemil , @ggreenwald , @jer_diamond , and @mathewi See also Mediagazer Tweets: Adam Tinworth / @adders : Looks like @SubstackInc is having to refine/restate its content moderation policy again: https://blog.substack.com/... The reason seems pretty clear: Graham Linehan (aka Glinner) set up shop there after he was removed from most other platforms. Alex Hibbert / @alexhibbert : I've held off committing time to Substack before seeing how its policies play out. Here it is: https://blog.substack.com/...? Why, @SubstackInc, is your policy to disallow content that attacks opt-in membership of religions? All the other characteristics on that list are immutable. Aaron Huertas / @aaronhuertas : Seems like a relatively broad definition of “hate” from Substack here, which they may not have actually intended. Of course, culture warrior types repeatedly reframe hateful speech as criticizing “ideas” or “ideologies.” https://blog.substack.com/... https://twitter.com/... Guillermo Rojas Hernandez / @guillermokrh : @SubstackInc So, this seems like Substack is opening the door to defamation of private citizens being allowed on Substack. The question of whether Substack is a publisher becomes important for liability, because if Substack can't be sued for defamation, the newsletter author can be sued. Emil O W Kirkegaard / @kirkegaardemil : Looks decidedly non-robust to me, especially the hate clause. These are weasel clauses that always end up being used. So I am not really apt to change my negative predictions on long-term viability of this platform for #freethought. The only line to do draw is legal or not. https://twitter.com/... Glenn Greenwald / @ggreenwald : Good, clear, defiant statement from Substack about recent censorship demands: making clear what is and is not “harassment” & “hate speech,” defending the right to express unpopular opinions, and emphasizing they will not make decisions from public demands https://blog.substack.com/... https://twitter.com/... @jer_diamond : This is a lot of words for @SubstackInc to say “We're still not telling you who our Pro writers are.” https://blog.substack.com/... Mathew Ingram / @mathewi : Gotta give Substack some credit for leaving comments open on this post about its moderation policies: https://blog.substack.com/... See also Mediagazer
Context & Ripple Effects
This clarification lands three months after Substack first staked out its position with a [[a:961369|policy pledging to resist public pressure to suppress voices loud objectors deem unacceptable]], and a week after criticism of its paid fellowship forced the company to disclose that its Pro program includes no anti-trans writers. Commentators reading the new guidelines immediately connect them to Graham Linehan, removed from most other platforms, setting up shop on Substack — Adam Tinworth frames the restatement as a direct response.
The deeper tension runs back to the company's founding posture: a Columbia Journalism Review profile recorded the founders insisting Substack is a platform, not a media company, where reader opt-in reduces the need for moderation — even as paying certain writers has been defended internally as an editorial choice.
First-order effects
- Writers who had withheld commitment pending clarity — Alex Hibbert said he was waiting to see how policies play out before investing time — can now evaluate Substack against explicit definitions of harassment, doxxing, and hate rather than vibes.
- Commentators split immediately along the lines the December policy anticipated: some credit the added clarity, while others probe how narrowly hate is defined and whether hosting decisions carry defamation exposure.
Second-order effects
- High-profile writers banned elsewhere become live stress tests of the written rules: each contested case will force Substack either to enforce its own definitions or reveal them as aspirational, with every outcome publicly legible in a way the old opt-in framing never was.
- Rival newsletter platforms inherit a reference document — Substack's explicit lines give competitors and critics a concrete benchmark against which their own tolerance thresholds will be measured.
Third-order effects
- If the pattern holds, subscription platforms discover that 'readers choose what they see' does not substitute for moderation once controversial figures concentrate there — pushing the industry from laissez-faire positioning toward formalized, defensible rulebooks regardless of whether they call themselves platforms or publishers.
The trend: Newsletter platforms are being pushed from reader-opt-in libertarianism toward codified content rules as banned-elsewhere writers migrate in and each hosting decision becomes a public test case.