News and paparazzi are kind of an unfortunate consequence of being a public figure. You're not in a private place in someone else's car...
Edit: Also, you probably are being filmed elsewhere in any major hotel (lobby, halls, etc). And I've seen plenty of that footage end up on TV.
edit: here's some precedent that may suggest you do have expectation of privacy as a passenger in someone else's car, though the scenario is different http://digitalcommons.tourolaw.edu/cgi/viewcontent.cgi?artic...
I think its unfair to say that simply by doing business with the general public, every CEO becomes a public figure.