WINNSBORO, LA—On some level, college professor Lynnda Dale, 48, knows she'll watch this Saturday's entire 12-episode Trading Spaces marathon, Dale almost acknowledged Monday. "Hey, I sorta like that stupid show," said Dale, when she spotted the row of listings for the TLC home-makeover series. "I've got a lot to do, so I'll just watch one episode. But on the off chance that I get sucked in, I can do those lesson plans the next day." Dale said that if she does tune in to the marathon, she won't pay close attention to the show, but will only keep it on for background noise as she does housework.