My son is obsessed. Now that he's mobile he has one goal on the floor of the living room. To reach the phone jack on the wall. To get there he has to crawl over the nasty, hairy dog bed. That's the main reason I don't want him doing it. What happens to the phone jack or cord is only a secondary consideration. We'll put up a barrier of toys and he'll tear past it. Or he'll sit in the middle of the floor, seeming to contentedly play with one of his toys...until he flings it to the floor and bolts for the jack. We have to keep a constant eye on him because he rarely gives up completely. Stinker.