I agree that most people do not know what they are getting into, but that could be said for any of the giants, i.e.. retics, African Rocks, and even Burms. I have a female captive born animal that is about 3.5 to 4 years old (the broker I bought her from was unsure as to the exact birth date) whom I've had since she was just 27 inches long and a few ounces. Now she is around 12 feet and 97 lbs and she is a great snake to work with. Docile, eats well, and other then the constant pond changes, a joy to work with. I believe Kelly H. who posts here occasionally keeps his without a large water source so in regards to management, if you kept them like he does, I don't see that a large green is any bigger problem then a large retic or burm. I feel that SERIOUS herpers or large snake fans, who are experienced, may be missing the boat when it comes to these large fascinating animals. Their reputation is based on wild caught individuals and their management headaches are, in my experience, greatly exaggerated, which is NOT to say that these snakes are great "pets", but are instead interesting animals that are poorly understood in the arena of herpetoculture. This may actually be a good thing as I feel that large constrictors as a whole are bought for the wrong reasons by the large majority of people. But for those who are serious about their snakes, CB green anacondas are great snakes to work with.
Just my opinion,
Shane