Let us reason. How can this series NOT judge how dangerous a pet someone has at the same time it wants to explore the reasons why some people want dangerous pets? It's bad reasoning and a misleading statement.
Reclassifying iguanas as dangerous is a wave pushed by the PETA movement which tries to force everybody to not have any captive animal at all. There are ongoing efforts in many urban centers to outlaw exotic pets of many kinds, starting with iguanas, and more succeed every year.
How many people/year are harmed by horses? They are large, extremely strong, skittish, self-willed animals that are not always handled properly by their guardians, leading to severe injuries, outstripping by far the number of injuries caused by green iguanas. Interview them please.
Most of us here do not categorize Green Iguanas as any more dangerous than a dog. The Banana Spider is an example of a dangerous pet: One quick bite and you're dead. These are traded in the US. Please interrogate those exotic pet owners. Green Iguanas don't hold a candle compared to the damage any dog over 15 pounds can do when it wants to.
"#4 top most dangerous". Hmmm...where did you get that list? The top most dangerous lizards that are kept in captivity publicly and privately in the US: Saltwater Crocodiles, crocodiles, alligators, Black Caimans, Komodo Dragons*, several of the large monitor lizards, down to the Black Throat Monitor which is very popular, usually VERY friendly, and at 45 pounds, can do hellacious damage when mishandled. Green Iguanas don't even make the list.
Please leave us alone, we don't intend to join your efforts to propagate your PETA agenda. Go after horse owners instead.
* Found in US Zoos, and I have no doubt are in private collections of the rich and not rich. Americans can get anything.