Hm, true . . . but why go to all the trouble of containing the waterbenders? As near as I can tell, this was about 50 years back, and they didn't seem to make any use of the ones they had. It's not like they went through training to break their wills and put them to work on ships or something; they were just kept there.

Actually, there was a note in the latest magazine, semi-joking, that the title might be changed to "Avatar: One of the last few airbenders"