Nobody is saying that these UTH's are bad products... simply that they need a thermostat to be safe, and probably should be labeled as such.
I have no problem that you don't need one, as I said if I was willing to put the time in, I could probably do so myself. But that is not something that most reptile owners CAN do.
Not that it really matters, but if my class aren't enough to show that I know what I'm talking about,then how about this. I work for a company that produces Military grade laser systems (both range finding and weapons grade) I spend most of my days running equations in MathCAD and MATLAB determining the potential heat output and transfer of the laser diodes as well as the other electrical components to ensure that our products don't overheat even in the worst imaginable conditions... if you think that heat transfer isn't in the realm of electrical engineering then I would venture to guess that you know very little about it.