I see that a few PetSmart employees are standing up for the company, and as a fellow Pet Care Associate I would like to do the same.
1. PetSmart does provide UVB lighting for all reptiles (even those who don't need it). If you look carefully into and above the cages you can see the tube lights just above them.
2. The PetSmart where I work does dust crickets with calcium and a multivitamin occasionally. Most stores at least dust with calcium.
3. There is some debate about whether the glass reflection issue really exists for chameleons. But assuming it does, it shouldn't actually be a big deal in the majority of cases because PetSmart gets their veiled chameleons extremely young, usually around 6 weeks old. They have not yet reached sexual maturity at this point and more than likely, they'd still be kept in an enclosure with many of their siblings if they were still with a breeder anyway.
4. It's true that glass enclosures with only top ventilation do not provide ideal air circulation, however, there is more to PetSmart reptile enclosures than most people notice. If you look carefully, there are ventilation holes on the sides of each individual enclosure (or maybe it's just one side; can't remember for sure). Also, there is a fan that runs extremely lightly throughout the whole setup. It's not enough to stir up dirt or dust; just enough to circulate the air. PetSmart's reptile setup is actually pretty well-designed for that of a big chain pet store.
5. The chameleons are required to be misted at least twice a day (along with all other arboreal reptiles and reptiles that require high humidity). At my store we mist the chameleons 3-4 times per day.
6. Remember, in theory, the reptiles are never supposed to be in PetSmart very long. The point of a pet store is to sell them. So their setup may not be ideal, but it is certainly adequate for them to live there for a few weeks at most. At my store we rarely have one chameleon for more than 2 weeks.
Basically what I'm trying to say is that according to PetSmart's company policies, the chameleons (and all live animals, for that matter) should be receiving adequate to excellent care (small animals and birds have it MADE at PetSmart). But of course, there are many stores with employees and managers who don't care to follow the policies and don't care about the animals' welfare. This is both sad and infuriating, but in such a large corporation it's very difficult to consistently monitor every single store. More often than not, the bad things you see in any PetSmart are the fault of that individual store and not the company as a whole.
Despite all of that, I do applaud you for standing up for proper husbandry and trying to make a difference. Don't ever stop using your voice for that.