A) this thread is almost 8 years old....
B) saying you don't need a thermostat is HORRIBLE advice. Google search snake burns...
It's our responsibility as keepers to keep our pets the best we can.
When I teach my niece how to ice skate hopefully she doesn't NEED a helmet, but you bet your butt she's gonna wear one... because it's MY RESPONSIBILITY to keep her safe. I would much rather have her safe and put her well being first. Maybe she never falls and hits her head, but maybe she does...shell be ok because her Uncle cared enough to get her a helmet...
Maybe your heating equipment never fails...but wouldn't you rather not take that chance???? I'd feel like a pretty HUGE ass if my snake was burned or killed because I couldn't be bothered to provide proper equipment to keep the animal safe. The snake doesn't have a choice, it's up to US to do the RIGHT thing.