I see no harm in having a dragon in a zoo, so long as it's allowed to occasionally snap up and messily devour a passing tourist. And it doesn't get its wings clipped or something equally horrible. And they don't try and restrict it from doing whatever it wants, up to and including leaving the zoo to go shopping for more things for its hoard.

Matter of fact, that doesn't sound too bad...

-Soreth
[PS: It's "Komodo" dragon, at least as far as I know.]