Funny, I have personally used one as well as seen countless others use these with no issue. Never heard of an issue either. Its not like a tractor trailer tire on a 2 part wheel blowing apart. I have blown the bead of a rim when installing an old tire and it wasn't even close to catastrophic. The spares are old and not safe, but really? I highly doubt they are a hazard past the fact that they aren't safe to drive on.