Don't be silly. Musk just wants to ban their Twitter account if they start to post the information to his specific plane. As long as they post specifics about someone else's plane, their account will be considered in good standing.

Since it was an individual not linked to a website, it's an even easier decision for him.

It's not the same information.

flightradar24 tracks jets. Go ahead and see if you can figure out where Jeff Bezos or Larry Ellison is from flightrader24. You can't unless you know the jet number they happen to be using.

@ElonJet is effectively tracking Elon and broadcasting that, and only that, information to the whole world.

In theory you could track Elon yourself by correlating public info (figuring out which jets he owns and using flightrader24) but it's orders of magnitude more effort and I don't see how "you can figure it out" justify "publish it to the whole world".