If we were that worried about the snakes stress, and its ability to always get away from the presence of another animal #1 we wouldn't be keeping a ball python in captivity in the first place and #2 We would NEVER handle our snakes because that would be very specificly putting them in the situation where they loose the option of crawling away and being alone. In fact, we would never even go into the same room as them where they can feel our presence.
Would love to see some kind of study one of these days that somehow someway proves that ball pythons do not benefit it any way from being around other ball pythons. Until that happens, it is only a theory. Just like my theory that states the opposite.
Why when this is true?
It's hard to jump down someones throat when they are experienced and educated on the subject... and you don't have a strong argument against him.
Did a 1 minute search and found this. You are welcome to search the web yourself. won't be hard to find. This is a case where two males are living together with one female with lots of eggs present. If you look in the background it looks like the guy is still trying to get a 4th snake out... Males kept together will battle for a female... but here is a case where mother nature seemed to make everything work out just fine.
YouTube - Ball pythons in the wild