Burms usually always calm down. And make great pets. No I have never felt my snakes are going to make a snack out of me I know they could if they wanted to but after keeping them for a while you start to get a feel of there boundaries and you know when your pushing it and doing something you shouldnt. Its best to raise a baby up to a giant so your comfortable with that individual snake.

Also there are 4 sub species of anacondas the greens and yellows are just the only ones in the pet trade.