Everyone on these forums like's to fly off the handle about stuff, don't worry about it. Ive had some strange things together in the past too. If you do it right it can work. Live moss looks great if you can get it growing, mostly just the tropical stuff grows well in vivariums. Pothos is an easy to grow and get vine that does amazingly well in a vivarium. I say if they don't ask don't tell, people that come here do there research or they wouldn't be here, so they obviously care about there pets.
P.S. watch out for things attempting to eat other things, its crazy what some critters think they can swallow! lol