These are excellent points in fact, I think it is important to bring up the information on MBD Iguana - Iguanas as Pets
All my reptile articles (except snakes) and that is even debated, have information on metabolic bone disease. Many people debate if the gecko needs the ultraviolet light (UV) lighting. I say play it safe. These animals do need additional calcium too.
Is ignorance unintentional cruelty? Ignorance is not an excuse if you break a law. How can people help others with awareness? Especially, before they acquire a pet or exotic pet.