The only reason people have to repeat themselves is because people come in here and tell people to get a dumbphone and an iPod Touch if "they don't want calls".
If they could actually make an argument that shuts down the OP's suggestion then this thread could die, but as long as people say blatantly ridiculous things like that, it's fine to keep it going.
The major selling point difference between the iPhone 4S and the iPod Touch is the inclusion of a phone modem and GPS (that functions quite poorly without cellular signal). If you're so ****ing caught up that your iPhone rings/changes screens when it receives a call, then you probably should not own an iPhone.
You think the iPhone should have an optional phone when it's the phone that makes the iPhone a goddamn iPhone.