This isn't a sarcastic question nor an attempt at snark: have you ever moderated a message board, forum, subreddit, facebook group, etc. with decent post traffic? It's tough. Even something that has a hyperfocused topic (e.g. a subreddit for dogs with sunglasses riding skateboards) will have naysayers of what should and shouldn't be allowed. Someone posts a pic of a dog. It doesn't have sunglasses, but it does have on yellow-tinted glasses for reducing eye-strain on monitor. Oh and it's not riding a skateboard. This dog is on a self-balancing scooter.

Most of your users won't care. They'll enjoy the content. Someone chimes in that the sub or forum is no longer pure. The content is similar, but it's off-topic. The board is going to devolve into just pics of dogs (which is a legitimate concern). Other people defend that the board needs content, and that computer glasses and a scooter is similar enough to be inclusive. So where do you plant you flag? Will there be a zero-tolerance policy for anything that isn't a dog wearing sunglasses riding a skateboard (OMG mods are literally Nazis!!!), do you allow users to flag posts for review on a case-by-case basis (need more mods), or do you relax the content restriction (this board is trash since it lost its focus!)?

Twitter has no focused topic. The platform is for anyone to communicate whatever they want within reason. With disparate cultures than span every corner of the globe, how do you stop the problem from existing in the first place? Not everyone has the tolerance for scathing, brutal honesty. How do you draw the line between that and bullying? How do you differentiate between well-intended people who are misinformed and people spouting propaganda? I don't have the answer, but my time moderating forums about topics that have no impact on society has taught me that it's pretty much impossible to create a perfect platform that appeases everyone.