Well...if it's for the kids, than we shouldn't stop at banning smoking in cars when kids are present. We should also propose bans on off colour jokes when kids are present. No, even further, lets ban talk radio from the airwaves because you know, when kids hear opinions, that might be bad for them. 

And then let's regulate the comments put out in newspaper forums like this, because we gotta protect the kids. 

And so on, and so on.