I am not the most experienced bp owner, but I have 4 and have not yet been bitten. A baby bp is more skittish and may bite out of fear. After it grows it will calm right down. I have also found that a snake kept in a rack is likely to feel invaded and ball up when you expose it and a snake kept in a pvc cage that gets to see you often while looking out of its hide to hunt will identify you as the food bringer and will appear to be glad to see you. I don't use glass tanks so I can't comment on those. Unless you happen to buy the occasional bp that has a bad temperament I don't think that you need to worry about being bitten. The natural instinct is to ball up rather than bite. Just be careful handling babies at first.