Lol. As long as the animals are healthy. I think they'd be great for the aquarium users. I forget, mine are in tubs so it's hard to give advice. I used to have a 50 gal though, and that was a stinker keeping humidity up in that. I needed a mister for it.
The automatic misters are too big for tubs, but when you have big cages they are great. Honestly, I'm not even sure how people fit them into chameleon cages.