I don't know a whole lot of people who haven't been betrayed sometime in their lives. Especially with us people who like to spend ample time on the internet. We're exposed to a whole new dimension of back-stabbing and deceit. But, the good usually outweighs the bad.
So, yeah, I've been betrayed. I've been betrayed by family, teachers, administrators, real-life friends, as well as as online friends. It's human nature to lie, but they come out in the air eventually. Only then do people actually feel betrayed, when in reality they've had the proverbial wool over their eyes the entire time. So really, betrayal is just something people should learn to deal with in their daily lives and just move on. Only when you learn to release that animosity can you truly be happy.
Tch, I should learn to follow my own preachings.