A purist is just a guy that has come to a point on the trail and then decides no one should go any futher cause he has found the Holy Grail according to him.
There are no true purist on this board I got to believe. The argument "I bust my ass all night while those guys just set a thermostat" is a weak one. Unless your willing to pile the rocks or dig the hole, chop down the trees with an stone axe, I suggest you need to get to the back of the purist line.
Just an opinion of course.