Pffttt who needs math when you have the magic of overeager eyeballs. So long as he's not working as an engineer anywhere so he's not a public hazard, I suppose.
Sometimes you have to expose a fraud thoroughly before you can leave them be.
This is what I try to do as well, for the benefit of the other hundreds reading. Alas sometimes it proves too strenuous and pointless. That's when you employ sarcasm and move along.