That is wrong, you are now training them to be poor captives.
No offense pyro, but I have raised hundreds upon hundreds of cal kings and they do not consume litter mates unless you again have poor husbandry.
If you want to raise the babies up to breed them then its best to raise them together.
You somehow think of snakes as windup toys. They have behaviors and they need to learn behaviors. What they really need is to learn to live with other snakes. Without this training, they become poor captives.
As long as they are not starved, they will not eat the animals they have lived with. Of course even people eat eachother when starved.
If you want practice the "WHAT IF" or "IS IT POSSIBLE" well of course it is, but all manner of things are not only possible but more probable. Most likely you snake will get out and die, or any other common accident.
As debated here many times, there are those that have no problem keeping kingsnakes in pairs and groups, then there are those that are afraid to do so. or had a problem.
You can do whatever you want, but I am opposed to you giving advice without knowing what your talking about.
The best advice is to allow the hatchlings to learn to live with eachother, as long as they are fed normally. If your going to go long periods not feeding them, then seperate them.
With training, kings can be fed by throwing in a handful of mice and they do not have problems, I know this because that is what I practice and have practiced that for 4 decades. The type of kings you have may be ones I developed in this way.
The point is, the method your passing on, is restrictive and actually causes the problems you mention.
how about thinking about how these animals work in nature. One base thought is, if they ate members of their own colony, there would be no kingsnakes, as who knows how to find kingsnakes better then another kingsnake. or if they ate their eggs, there would be no hatchlings, as all other kings would do is follow the female, if they did not eat her already.
So how do they work? How do they live in the colonies they do? What allows them to do that. Cheers