If you look in the case of JannB and misslily, some chameleons actually DO enjoy attention and being loved on. JannB's louie will even give her kisses back

Some just have evolved to be much more tame, like dogs or cats, and some just prefer to stay with their natural instinct.
I just don´t agree on that one. I dont belive any chameleon enjoys attention. Im not saying that they are dying of stress as I know some species are more tolerant to stress, such as F.pardalis, but their is a diffrence in accepting a human and enjoying a human. If it was up to the chameleon, im pretty sure what the chameleon would choose.
If you just have a little knowledge about chameleons, then you would know that they suffer from stress much easier then many other animals. Thats just a fact.
I also think its wrong to handle other animal species in a certain degree, but some animals are less tolerant to stress and you really can´t compare a rabbit to a chameleon. You have to know what kind of animal you are working with and how each animal species have their own behavior. Wolves/ dogs lives in packs and are more social animals. Chameleons are solitaty animals that depend on their camouflage to avoid predators.
Their is also a huge difference in "wild" animals and domesticated animals.
I can understand WHY people have the "need" to handle them, as a zookeeper my self, I would love to handle all the cute tiger, wolf, giraff etc. babies that I am working with, but Im not. All people who keeps animals should study animal behavior and it goes for dogs, fish, birds, chameleons etc.
I love chameleons for what they are, the way they look, their natural behavior and how they have adapted to live they way they do.