h/t @aral Funny coincidence: My 7 year old son was asking me all about (censorship) ratings for TV and movies in the US. We went through "PG-13" and "R," "NC-17," and when we looked it up it had "X" and "XXX" but it turns out those aren't real ratings. He asked about them, though, and why they're named with "X" or many "X"s. I told him that it's common to use "X" when things are really bad or when you shouldn't use them at all. e.g., like in cartoons poison jugs are marked with "XXX" (he remembered that). And, we write "X" on things to cross them out. So, "X" usually means no one should see it/use it. That's before any of this rebranding of twitter, but as soon as I saw the rebranding, it reminded me of that conversation 😆 . Shoot, I'm glad I taught him that. Now he'll know to avoid twitter, too ​