Love it or hate it, there's no denying that reality TV -- also known as unscripted television -- is a titan of the entertainment industry. In fact, if you have cable and turn on your TV right now, you'll probably find a reality show of some sort playing on multiple channels. Most people know this sort of programming isn't as 'real' as it may purport to be... but what made this stuff so successful? Perhaps most importantly: Why do some of its critics allege this content is worse than tacky? Why do some people think it's dangerous?