Because they didn't do their research prior to their purchase.
I was looking through craigslist like I always do and I came across this guy's ad. Everything seems fine and whatnot, except for the fact that he is getting rid of it due to lack of humidity in his house.
The humidity is low because he put the heat lamp with a ceramic bulb IN THE ENCLOSURE WITH THE SNAKE!!!!!!!!!!!!!
In the picture in the ad, the snake is climbing on the lamp!
Those ceramic bulbs are upwards of 500F!
I emailed him and told him to remove that lamp from the enclosure immediately, and I hope a few of you will help me get my point across, we do not need more animals being hurt because of ignorance/lack of knowledge.
Here is the ad in question: http://portland.craigslist.org/clc/for/1171769438.html