Do BP's pose ANY conceivable danger AT ALL to small children?

[B.P.'s 4me]

As others have mentioned, you can never absolutely guarantee that a ball python/small child interaction wouldn't/couldn't result is a negative experience, but much depends on what your definition of "danger" is.
If you're talking a scratch, or scrape, you'd have less to worry about from a ball python, than you would a hamster, gerbil, rabbit etc. Even budgies and cockatiels can deliver a painful bite.
Statistically, in the U.S. in 2016, 13 of the 42 deaths attributed to dog attacks, were kids under the age of 9.
Much as we'd like to, we cannot prevent our children from ever experiencing something unpleasant, but we CAN expose them (in as safe an environment as possible) to new things and situations. Rather than being concerned about the extremely unlikely possibility of a unpleasant supervised interaction with a ball python, I prefer to consider what the positive aspects are.
Handled as a learning experience, a child exposed to snakes will learn some of the principals of tolerance and compassion. Once they're comfortable with handling the snake, they will gain confidence and satisfaction in overcoming any nervousness they may have originally felt. Because a snake isn't interactive in the same way a dog or cat is, a pet snake will teach the child patience and the self discipline to learn how to interact with their pet on the pets' terms. A pet snake may also earn the child some respect from friends and peers who are less comfortable with reptiles.
Our kids are never completely safe, they could get stung by a bee for that matter, but frankly, I think kids every day, suffer more harm from unkind words, thoughtless actions, bullying at school etc. than they ever would from a ball python. Supervision, a positive parental attitude, and information on correct handling and care of ball pythons could make this SUCH a wonderful experience. However, unless both adults are 100 % in agreement, it's not likely the snake has much of a chance.