I agree, but why even (learn how to) house them together when you can simply get another tub? There is a small risk of injury when you house them together, and for the menial cost of a tupperware and a couple feet of flexwatt, it's just not worth taking the risk.
Because there are some species that will not breed unless you keep them together.
If anyone is trying to keep two snakes in one little tub, they really shouldn't be attempting the cohabitation thing.