John K Jordan
So it wasn't a joke. I would personally not use it. In the 70s I worked in an inspection lab where we did pressure testing - I know exactly what compressed air/gas can do. Google can show cases where PVC has exploded sending shrapnel everywhere.
Do the research. Some reading to get started: http://www.hoseandfittingsetc.com/our-blog/bid/94802/what-type-of-pipe-should-i-use-for-my-air-compressor
That said you can find numerous accounts by people who use PVC and have not yet had it hurt them or their children. And some people have not yet had a wreck in years of texting while driving. Do you feel lucky?
If you want to use plastic pipe instead of metal the RapidAir system has kits: https://www.amazon.com/Rapidair-90500-Master-2-Inch-100-Feet/dp/B0015A11U2 I installed this and 8 outlets in and outside my shop. I use brass and copper air fittings, valves, drains, etc. In my last shop I used blackiron pipe when I put the compressor in a shed. I like working with the plastic tubing better.