Housing two snakes together is fine IF YOU HAVE THE EXPERIENCE, so please don't preach your OPINIONS that two snakes should be kept seperately like they are some sort of set rule.
With that said, I agree with the recommendation to house seperately. This poster is completely new to corn snakes. I would suggest keeping them seperately until adequate experience is obtained.
It is my OPINION that newer keepers should keep their snakes seperate. Inexperience of the KEEPER is what causes all of the risks listed.....it really has nothing to do with the snakes or how they are housed.