Yes. It was done innocently and online (he didn't know any better, and to this day still probably doesn't understand completely why I freaked out) but it bothered the hell out of me. I never want to repeat that again.
Mine would randomly show up in my frequented forums (that I didn't tell him about) to say "hi" and talk to me. He's since been married, too, things have dropped off. There are several other things too, but i'm just thankful he finally understood.
Yes. The first time was when there were no stalking laws and the police literally looked me in the eyes and said, " You will have to be hospitalized or dead before we can do anything. " this while my stalker was on my front lawn threatening me, was on probation for something else and the phone lines had been tapped by the police to get the death threats and still they did nothing. I had to change high schools multiple times and move out of my city. And that was just the first time.
It's an absolutely incredibly terrifying experience to be stalked, especially long term.