This is not the most important issue facing the nation, but an appeals court has struck down as unconstitutional an FCC ban on the broadcasting of profanity, which has been in place since 2004. This is an appropriate ruling. It's not the government's responsibility to regulate public morality, and there is no way in which the broadcasting of profanity, however distasteful it might be, can endanger public safety.
If you don't want your children to hear profanity on the television, then watch stations and programs which you are sure will not have such content or, better yet, don't watch television at all. A good book or a walk in the park is a much better way to spend time than watching the idiot box anyway.