It does make sense, though. If you're the type of person who wouldn't normally watch South Park because of that sort of content, you'll probably be a little upset to be watching a completely different show (on a completely different network) and be hit with it. I don't agree with the censorship of actual programs - as people watch what they choose to watch and would expect to see certain things going into a certain show - but no one has any control over what commercials or promos they see, so I can understand the concerns.