[schuyler2d]

First there's the legal set of things: doxxing, child porn, copyright violations, revenge porn, etc.

Then there are softer aspects: disinformation, threats, abusive language that are often easier to block than for the company or for society to 'climb back out of' or address post-facto.

Twitter and other platforms are built for viral marketing -- not all content should have the privilege of viral marketing. Then as a product, Twitter and others might want to think about the minimum experience level. What kind of demographics are going to be present over time, if every woman-identifying account, if they peek at the default-moderated content, see 1000s of abusive and hostile tweets directed at them?