If elon owns twitter privately he can just go through his comments and ban the impersonators on the spot. He has complained for years about twitter not doing enough to stop scam impersonators. In fact he can ban anyone then. He would literally have that power. Conversely, he could also unban anyone. There would be no chain of command. Imagine using fakebook but then also having the power to ban anyone too. I think he may even be able to read private DMs or see accounts who blocked him. It could have national security implications if he can read Obama's DMs for example.