Great thread! I saw on my facebook news feed a few days ago a post by NERD suggesting that everyone consider the things they do that could be dangerous. They also commented something along the lines of how not to put heat tape on a wooden rack and that metal doesn't burn. So it made me start thinking about whether going with a metal rack (eg ARS/Freedom Breeder) over plastic (eg RBI/Animal Plastics) would be a good idea from a fire prevention standpoint. I have such a small collection that I am currently using RBI & AP, but it made think about my future plans. I am not even close to being an expert in any of these matters, so I was wondering what other people thought?