1- Just because people have been doing it for years, does not mean it is safe to do. People have been drinking and smoking for a very long time.. Doesnt mean its safe to do.
2) "No ill effects"? How would you know this? Some hazardous material doesnt just show up as a huge sign that says "I have kidney cancer!". Reptiles are not capable of telling us what is wrong if anything. Yes, we can notice weezing and contribute it to RI or see black dots and say its mites.. But if there is an internal problem that is very slow acting you might just not know about it at all. My aunt had liver cancer for literally 9 years before they even thought anything was wrong. Things are not always obvious.
I am not saying this plastic toxin stuff is legit, nor am I saying the opposite. I just felt it was a bit short sighted to suggest he is just an Anti-Tub guy with no real evidence.
Personally, I wouldnt be shocked if it did in fact cause serious problems we are simply unaware of. Just cause a government says something is ok, doesnt mean it is safe...