For my new big turbo, the kit came with a PTP lava blanket.
They work, but not to an appreciable degree for most people.
I agree however it's one of the things that make it a really good idea to carry a fire extinguisher in the car. And unless you're regularly taking it off to check for oil leaks on the turbo lines, it's a little hard to pay attention to the problems that would make it a fire risk.
basically. Had a bunch of numbskulls say silly shit like that on FB too.