There are worse things kids can get into than swearing. Like bullying other kids, bullying animals, being a prick (which doesn't require profanity), lie, steal, cheat, break things, murder the house cat and drown it in a tub of acid they got from Grandpa Lincoln -ahem-

They're just words. And I'm pretty sure there are songs out there advocating much worse than nudity and some naughty words.