This isn't an "amazing" experience, but an eye-opening one.
Way, way back on Myspace (ha, I know!) I became friends with this guy (we'll call him Neal). Neal was completely in love with this chick who lived a couple states away from him. He would chat with her all the time online and finally it moved to talking on the phone. He was a drifter - no job, no ties anywhere - so he decided one day to move to where she lived. She agreed to meet him at the bus station and start their lives together. The night before he was to leave, he was on Myspace and realized that her profile was gone. He tried to call her, but she didn't answer. He called me asking what he should do. I (being the stupid, idiot, romantic that I was) said she was probably just working and couldn't get back to him and he should go. So he got on the bus....... he called me the next day. She never showed up at the bus station. He decided to go where she worked to see if she was there - they'd never heard of her. He went to her college - never registered. He called me in tears.
We kind of lost touch after that. I'm not sure what happened to him, but a mutual friend of ours told me a few months later that he'd found out that "she" was actually a "he".
I've never forgotten that - how easily you can be duped into trusting someone online when it's all a flippin' lie.