I think many people will agree that we do not want to send the wrong message. As a whole, chameleons are territorial and do not want to be messed with the most part. There are some individuals that are far more tolerant than others. I had a male Veiled who never became aggressive and was easily handled, but I would never pressure him. If he wanted to come out, fine, if not, fine. The majority of my animals only come out for deep cage cleaning. About 3/4 of them will readily handfeed. I have one of Jann's babies and she is a food monster-she sees me as the food transporter, and she will still walk out on my hand, probably because I will carry her over to the worm bin to select a snack.
I just hate to think there are people out there forcing interaction on their chams and stressing them out until they get sick or die from the stress of it all. The last thing you want to do is force handle your cham several times a day or show it off to crowds of people. Their tiny purposed brains are not equipped to deal with that.