I think you're missing the point. If you have to hide your identity to make a joke, then it ain't funny.
Okay, that is an absolute statement and I'm pert' shure you should be able to come up with a counterexample. In the case of humor, I think there is even a particular class of joke that actually hinges on the anonymity of the person making the joke. I haven't seen any examples in a long time, but I think I have some sort of vague memory of such.
Yet my fundamental position remains that freedom of speech should not grant freedom from consequences. There is such a thing as harmful speech and the people who hurt other people, by speech or otherwise, should be liable for the harms. Careless People
spent a LOT of time describing such situations, especially in Myanmar. Just because they did it for money doesn't make it better. Lies are especially bad when anonymized because the normal penalty for lying is a loss of credibility that reduces the effectiveness of the next lies, but if you've heard one AC, you've never been sure it wasn't a fresh liar with a bigger lie.
There actually are some people who might be able to get away with this joke, but I think it's a really small set. Perhaps only the Venn diagram overlap of people at Brown University who have distinctly brown skin and who are also named Brown. While wearing brown clothes? I would wager at high odds against AC being in that intersection, but since it's AC we can never know. But if I was a professional and real comedian I might be able to come up with a scenario with a character that could use some form of the joke?
I'm realizing that talking with genAIs has passed the point of being a better use of time than talking with many, perhaps most, people. AC people least of all? (Oh wait. What about ACs that are genAIs? That's a Turing test long passed.)