This is certainly a joke. I am not surprised that this is one of the means of propaganda that Elon Musk is excellent at. Do you think that Elon fears for his privacy? of course no? But he definitely liked the story and wanted to use it to get more excitement on Twitter. Elon is manipulating everyone and I don't think anyone is able to manipulate this man, not because he is the smartest man on earth but simply because he is the richest man!! As long as you have the money, you can do anything, even the things that seem to be against you will turn out to be in your favour.
You are right with the wealth that Elon Musk has, he can do whatever he wants, I doubt that the reason Elon Musk bought Twitter was because
he was scared by 19 year olds. Elon Musk must have big plans why he decided to buy Twitter at such a high price. Moreover, Elon Musk is indeed
a visionary who has a certain strategy to do something big in the future. So normal people like us, it would be hard to understand the real reason
why Elon Musk bought Twitter, I believe Elon Musk wants to enlarge his business empire through Twitter. Moreover, Twitter is one of the platforms
often used by Elon Musk, so it's only natural that Elon Musk wants to have Twitter, so he can freely do whatever he wants through Twitter.
So of course it's a big joke if links Elon Musk's Twitter purchases to Jack Sweeney.