Anybody can be someone else online, but not Jack Dorsey, as he was the only @jack on Instagram until he recently quit the platform and deleted his account. This made his first name-only username up ...

A new Twitter account launched by suspended user Jack Sweeney that tracks Elon Musk’s private jet flights has been “search banned,” the mogul’s college-age tormentor told The Post on Friday. Sweeney, ...