Alright... I was trying not to get involved, but...

Does it say, anywhere, or have you personally viewed corn snakes in the wild living communally? As far as I have seen or read, most snakes only come together for the mating season or to hibernate like Garters. That leads most people to conclude that they are solitary most of the time. This, plus the risks of health issues or cannibalism, however small they may be, prompt most snake keepers to house their animals separately.

Until a full study is done on whether housing corn snakes together is beneficial to their health and wellbeing, there will be no solid proof EITHER WAY. The safe thing to do until then is house separate.

It is true that many people house their snakes together and never have a single problem. It is also true that there are many snake owners who have never had to take their snake to the vet it's whole life. This does NOT mean that something couldn't happen that would lead to a vet visit, just as keeping snakes together does NOT mean there couldn't be problems.