I had an online stalker who actually became a real life stalker.
He followed me from a social club miles from my home ,then started turning up outside my house sitting opposit in his car for days on end till i became so paranoid id not go out ,either taking my kids to school to going shopping, in the end i rang the police who arrested him and i applied for a restraining order against him , scary at the time and makes you feel very insecure