jason, no thats wrong they are there because they want to be and they can.
i didnt really explain myself! im not saying in this example the temps are wrong but im saying it is a possability!
with out beeting around the bush, i think thermostats are great cause they make heating more safe, i think the BIGGEST problem is, is the bulbs people use!! correct me if im wrong but one of your concerns is that people are using the wrong bulbs which results in no gradient but a hot box? i agree, but i still think the thermostats should be used but in conjunction with the right bulb! the wattages you use i think are fine cause they are safe cause there is little chance of over heating and still provides a temp gradient; i do however think they should (im most cases) be conected to a thermostats to ensure that the temps dont get to low down south or to hot up north. as you mentioned you use a timer when you know the temps are going to get above 30, what if the wether is unusual and it hits 40 and the timers are in place to turn the heat off? thats why i like the thermostats....they are a safety backup system.