I can't remember the forum, it might even have been 24-hour Campfire, where real names and threats started flying. One of the guys in the argument was even posting aerial photographs of the other guys house.
One of guys I know personally picked up an email stalker. Since his email address was also his business address he put up with it for a long time hoping the stalker would tire out - he didn't. The stalker even gleaned the names of my pard's kids and referred to them in the messages. The stalker was smart enough to never send anything threatening, but the references were enough to be unsettling.
