Here is an survey article that says the best invetion ever is ......toothbrush. Phew!!, you might think but MIT professor Merton Flemings is pretty exited to say this. Taking about inventions, he also says about Farnswoth who devoted his life to develop the basis of today's television.
When asked him what if few people would argue that television is an invention that do great harm, he replied "With any good tool, you can do the wrong thing with it. [When I was a boy] there was a machine in the shoe store I could stand on, push a button and X-ray my feet. It was a terrible thing, but we didn't know the danger back then."
We had a similar dicussion on Kiruba's blog where I was pointing out that television isn't a harmful invention and it just depends on how good we use it.