Your post seem to be getting constantly more aggressive, tone it down a bit.......
On a side note I'm pretty sure the guy is right, when it starts going sub zero I'm pretty sure you're not allowed to do it anymore. You could argue that the water chillers are phase coolers anyway since they are effectively cooling using the same sort of system, but we know that not to be true. What's important is we draw the line somewhere, can't have a waterloop at -20c with treated water or other coolant and still call it water cooling, becomes a bit of a joke then....