All heaters be it UTH, heat mats or flex-watt should be regulated by a thermostat or rheostat to prevent the snake from getting burnt.
Ideal temp on the warm side should be in the mid 80's.
I agree with Lenny, but there are other ways to regulate heat too. I use a lamp dimmer. After testing the heat of the tank and adjusting the dimmer to the correct heat(measured by a thermometer on the warm spot), mark and tape the knob on the dimmer: just add snake.
It works just like a thermostat and cost way less....but it takes just a little more time to set.
In an enclosure you would keep in your house? I would say no.
In your back yard, enclosed in cinder block? Absolutely. Tortoises, Anoles (great food source), other snakes (but not too many).
The closest you would get would be keeping a few Garters together in a large enough tank.
Sorry if this sounds like a dumb question. I'm guessing the answer is "no", but I was very curious about it anyway.
Thanks for the replies!