Never by a ball python. One defiantly would If I let him. I just approach him properly to avoid it. The other 13 for comparison are fine. No caution needed, maybe except at feeding time for a few.
Approach him properly? for me that means covering him with my hand, not from the front, swiftly and confidently but not too fasts. Then gently scooping him up in my hands.
That has worked for me for many snakes. Once up and held securely, not many snakes would want to bite the tree they are in.
Admittedly I have not been fast enough for a few other snakes in my past.