using online mapping technologies to "visit" neighborhoods, hangouts, places, etc.
I just spent 30 minutes haunting The Mission District using Google Maps satellite mode.
A term used in reference to the behavior of an individual that is in an internet chat room but they're not talking to anyone in the room. It is considered rude netiquette and usually upsets the other people in the chatroom. Could also be called "ghostin'".
Casper won't talk to any of us in the chat room. I guess she is haunting it.