Former THE O.C. star Rachel Bilson is determined never to be photographed without her underwear - slamming "careless" celebrities for allowing snappers to get shots of their private parts. The actress insists stars should be more careful when they are out and about as there are plenty of ways they can protect themselves from the waiting paparazzi. Bilson is convinced it's easy to escape unwanted press attention - by avoiding well-known celebrity nightspots and always remembering to wear undergarments. She says, "I've seen what the paparazzi can do to someone if she's careless about how she gets out of a car and if she forgot her underwear. Fortunately, I'm not one to forget about underwear. Ever. "I've had these guys trying to get these shots, crotch shots, I guess, and you think, 'You've got to be kidding. This is the ultimate down and dirty ambush.' "But it's something you can pretty easily protect yourself from. If that's being a celebrity, then I'm not one. I like my privacy, I like having quality time with my dog. I grew up in Los Angeles, my family is in the business, and it's easy enough to avoid the obvious places where you'll run the gauntlet."