You guys are crazy.
First, some answers to your questions:
Yes, I do own a car. I tried living in LA without one and found it impossible. Still I ride the trains often and do a good job of walking as much as possible. Over the years, I have always lived in LA locations that have subways stops nearby.
No, I do not think LA should impose a huge car tax. I would simply prefer to see better mass transit options available, and the city is moving in that direction, albeit slowly.
No, I have not seen any major movie stars on the subway or on buses in LA. I have seen a lot of them around, just not on mass transit. I've always said that pro-mass transit celebrities like George Clooney should ride mass transit in LA... that would get people to ride mass transit all the time! 8>)
and finally, thank you to the Asian couple who emailed me a picture of themselves having sex on a subway car. I think they are in Tokyo... there's another reason to advocate for mass transit!