Yes, the thought has crossed my mind more than once. In fact it is one of my more prominent day dreams that also have a hint of reality in them :-) Although I wouldn't call it a day dream, since I not only have the inclination of doing so but I am also completely capable of doing something like this.
In the spirit of being truthful, I will also admit that the thought of doing so permanently is not what I want. To be able live without the privilege of modern technology and other creature comforts is something that I only want to do as a 'part time' thing. The idea is to detach myself sufficiently from this modern world to be able to see the bigger picture. My idea is not that of 'abstinence' from it.
I remember that one of the first times that this kind of thought occurred to me was during my university days and I wanted to do it so that I maybe able understand this world better and also be able to appreciate the gifts and comforts that I have and not take them for granted....