I've been bitten more than once but a snake showing intimidating posture can still do just that. It is pretty safe to say that if you are keeping young snakes you will get bitten at some time or another. Hopefully it is just a warning tag and not an "attack." When I say "attack" I mean the snake strikes, hits, holds on, and proceeds to constrict. I have been tagged by an 8 foot Boa and "attacked" by a hatchling Burmese, and I'd take the Boa tag over the Burm attack any day.