I dont like putting snakes together all the time, there are benifits for not, like lesson the chance of cannibalism, stimulating breeding and isolating any deseases or health problem that may occure, but the only benifit to housing them together I think is room space. However large enclosures with plenty of hides you shouldnt have much of a problem. I found the scareist time is after feeding when the sent of prey is on one snake and the other/s are still hunger, even I have seen some of my snakes try and eat their water bowls because of the smell