South Park goes after censorship

Last night's episode of South Park dared to poke fun at Prophet Muhammed.. well.. not directly. Read about it here.
It was quite bold and intelligent. It used the 'Family Guy' to do the actual jokes! Even the most religious fanatic will have trouble pin-pointing the "infidel" here :)
So, should TV shows and the like be allowed to make fun of religious symbols?
In my humble opinion, most definitely! It is a cartoon for god's sake. There is an 'off' button for those who find this inappropriate.