And the test is simple: "Does it make me want to punch someone in the face"?
Not "me" as in the average reasonable person, "me" as in Elon Musk.
If you post something that makes Elon want to punch you in the face, you will be banned from his blog.
"I personally wanted to punch Kanye, so that was definitely inciting me to violence. That’s not cool."
Eg. "I'm at McDonald's getting a burger with my friend" is ban worthy because it says where your friend is
I think the largest community where I've seen this kind of autocracy go well is Fark -- people are generally reasonable, for whatever reason the trolls do not do as much boundary-pushing and rules-lawyering as on other sites, and it's generally a calm and funny place to hang out. Drew Curtis is just, like, a nice normal person.