It may just be me, but I feel that some of the comments stated may have been in response of my earlier post and I would like to provide some clarification on
my opinion of this question.
First, When I stated my opinion of Deforestation Versus "The Trade" It came off that I thought the pet trade was much worse than the deforestation thats going on in Madagascar and South Africa, I believe that they are equally to blame. And I also stated that I believed that Chameleons could persevere even with deforestation going the way it has, Now I had just gotten done reading an amazing article that was speaking about how chameleons could survive this and in fact already are by moving into more public areas such as gardens and other shrub inhabited areas, Now I was a little "type" happy and stated this about parsonii! Now after thinking about it a bit longer I do not think this to be true of parsonii just based on their SIZE alone much less their feeding requirements.
If I may, I'd also like to state that this article was geared towards "South African Dwarf Chameleons"

Ooops Sorry! I'll research into it a bit more next time!
And as for keeping them, I believe they should only be kept by People that intend to study them and reproduce them, as I don't believe the deforestation will cease anytime soon and nor will the pet trade whether it be legal or not. So I think they should be kept and reproduced so even if this species does become extinct in the wild, we will have captive bred populations in zoos and other institutions for other people around the world to enjoy! IMO