I would definately Not condone not using a t-stat or rheostat! That is just asking for trouble in my opinion. The only reason that I mentioned that my general temperatures are the same year-round, is because I do use rhestats, and unless the ambient temps stay the same, those are not really safe. Let's say that a new keeper has their UTH hooked to a rheostat in your typical living room. Temps go from 65 to 75 overnight (this happens in the upstairs of this house on hot days when the heat isn't on.. no snakes up there though.) That rheo is going to possibly either cook the snake, or be inadequate and cause its temps to drop too low.
So technically, yes, I have the house's thermostat controlling my snake room. So no, I am not without a t-stat myself. I really want to see how the OP does things.. I will re-read the thread because I don't recall her explaining things.