Yeah, handling chameleons is definitely not recommended and should not be done frequently. It is a major stressor and excess stress can decrease a cham's lifespan. Most people only handle them when they have to clean the cage well or for a little health check. Of course the occasional photo shoot comes up now and then, but overall handling should be kept to an absolute minimum. I've only handled my veiled twice and he doesn't enjoy it and therefore I don't enjoy it. Just keep your cham's best interests in mind. Some chams may fall when trying to get away from you and it's not worth the risk to put them in danger, in my opinion