Well, snakes are predators. Some make a habit of preying on other snakes or reptiles, but even among those that do not, there is still a risk.
I would consider that what a zoo might be willing to do (to maximize exhibit space with additional snakes at the risk of losing to predation a commonly available creature like a boa) might be very different than what you or I would choose to risk with our pets- at least, speaking for myself- I wouldn't do it, because I've seen first hand that snakes that do NOT feed on other snakes will still sometimes go rogue, killing & trying to eat their intended mate. Yes, even very well-fed snakes.Accidental bites to "room-mates" also happen, just because one responds to the sudden motion of another, with no intention to harm much less consume the other snake. Been there & seen that too.
Snakes will be snakes.
But if you want to risk your animals, that's your personal decision...just not what most here would recommend, & if it goes badly, we might even be tempted to say "I told you so". If zookeepers never made mistakes, there would never be escaped animals from zoos, or injuries to keepers & others, or untimely deaths of zoo animals, would there?![]()