This is a very common practice to preserve animals for scientific research reasons. There are countless uses to specimens preserved in such a manner. Considering the value preserved specimens can be toward research and our future understanding of these animals, why would you assume that anyone who had the forethought to preserve a chameleon in such a way is a freak? Why not make their loss of life a benefit to something larger down the road? I've preserved any chameleons that die in my care for years now and they are extremely useful. Additionally, I have keepers and breeders all over the country who have been doing the same send me their frozen or preserved specimens for my PhD research as well. Far from freakish and extremely useful to our broader understanding of these animals.
Chris