What's wrong with the new owner of Twitter using Twitter in exactly the same way that a lot of other Twitter users use it for, memes and jokes?
I find that rather refreshing, actually. It's a variant of eating one's own dogfood.
In my opinion what would be inappropriate for a billionaire CEO, and reveal deep flaws in decision making process, and the decision making process of any government official or governing body who subsequently partners with that CEO, is to fraternize with the likes of Epstein after he was convicted, e.g., https://www.nytimes.com/2019/10/12/business/jeffrey-epstein-.... But I guess morality is also subjective so people might disagree with me there too.