Nice To Nasty, All because Of The 'Inter-Webs'

We kids now a day really know how to navigate the "electronic world." We do use it wisely and other times, not so much. Most kids boost each other up by commenting nice things, while others use the internet as a shield and talk badly to/about people. If you don't say those harsh words to people face to face, or you wouldn't say those things in front of your parents, why post it online? What does the internet do to change nice people into vicious beings?