Wow, ok. You really can search by people's first name and last name, and tail numbers come up. I'm surprised. I just assumed it was like license plate numbers; my bad.
Interesting. I am surprised there is a "name" field. It has some random holding company ... but if you're an individual not playing the shell game, are you required to put your actual name there? Or is there an option not to?
Yikes, people. I didn't say twitter should ban posting license plates and airplane tail numbers, I was just saying those things are pretty equivalent and there should be a clear policy on it that is followed consistently.
Publishing someone's personal jet callsign should be treated similar to publishing someone's license plate number, phone number, or home address.
And an organization like Twitter should have clear policies on that.