My doors lock when i put my car in drive, therefore no one can open them.
If I'm driving alone, my purse sits in the passenger seat. If I'm driving with Hubby, or a close friend, it goes in their lap....they're all sports about it. If I'm driving with people not so close as to hold my purse I just keep it in my lap.
Too afraid to do the between me and the door thing...what happens if the door randomly just opens as you're driving....eek!