I think this is the difference of general practice between all pro snake keepers and hard headed newbies. Almost all of the experience snake keepers and breeders feed in the same enclosures and keep their snakes separate from each other.
I am a newbie but not hard headed one. The funniest ideas came from those people with cats and dogs and had very little experience with snakes. They see dogs and cats are happy to cuddle, play and run, so snakes will be the same way as dogs and cats!!!!
I want my snake to be less aggressive when I or other people are handling. People handle their snake outside of the cage not inside the cage. so, here is the educated question. If there is a thing called cage aggression, do you want your snake to be aggressive inside the cage or outside of the cage when you or other people handle the snake? Remember, people handle their snake outside of the cage.