Now, after the item below, let me back James Lileks 100% here.
Most people will behave differently when there are children around. Some topics don't arise, some words aren't used, some gestures aren't made, etc. Just put the little monsters to bed and then do what thou wilt.
Our streets and open airwaves are like an area where children are around. IMO it isn't asking much of advertisers to maintain some semblance of decorum in such public spaces.