It took a hundred years before the effects of asbestos came to light. So if you get a painful cough around Christmas 2102, you'll know what caused it.
DIY and fiberglass and safety
I have a friend of mine that built some bass traps and acoustic panels out of fiberglass and considering what he paid for the raw materials, they do a good job; however, I wonder how safe it is to have all that fiberglass in a listening room. Does anyone know if it is safe?