I've never met anyone that would call years of harassment that extended into real life "trolling". That's personal and it's a serious problem. I run a large forum (I'd guess some of the kids you mention use it) and I've had all manner of insults and threats, all of which are trolling, they're from people that want to annoy me or upset me but only because they see me as a target at that moment. If someone were to come to my house and leave things in my postbox, or mail me stuff, or follow me around the internet for years that would be harassment.
I just asked a bunch of my staff members (people that deal with this sort of thing every day) and everyone considers what the OP went through harassment, it's not in anyway considered trolling.