Worried?!?!

Should I be worried that my sons favorite saying is "what the"? He says it on a daily basis and even though he doesn't finish the sentence, thank goodness, its a little odd to hear my 3 year old son say it. He picked it up from the alltel commercial with all of the guys from the other mobile phone services. I knew that he would pick things up from us, and far worse than saying what the, but from a commercial, come on. Maybe we are safe from now until someone teaches him the last word of the phrase. I hope no one ever teaches him or he just comes up with something else annoying to say.