I suspect that your parents' neighbor would already be unhappy if someone smashed their house into micron-size particles, heated it to 155˚F and kept it there f

I suspect that your parents' neighbor would already be unhappy if someone smashed their house into micron-size particles, heated it to 155˚F and kept it there for many hours. At that point, not having the PET broken down into monomers is a pretty lousy silver lining. (Seriously though, it needs fairly particular conditions to work.)