Jootuber 

One who surfs for random youtube usernames and posts comments such as "I was Here", or a comment related to the username, or just plain spam.

Some popular stops are:
youtube.com/index

youtube.com/lol

youtube.com/miley

Dude, I've really been practicing this hobby of bein' a JOOTUBER. It's pretty fun, man. Now people are starting to comment on my channel! I'm already up to 100!

Jootuber by Ashabeth October 20, 2008