Here's what the Guide to the Potterverse* has to say about Fanfiction Writers and their culture:
The Fanfiction Writer is a harmless creature that comes in many varieties and styles. However, most of them seem to be lacking in the way of name, some of the most common having 'skate', 'gurl', '4ever', and/or the name of a character from the fanfiction the writer likes to write in it.
The Fanfiction Writer is a semi-social creature, usually found in small groupings around forums. The younger ones tend to speak in an almost untranslatable language, some of the more common words being 'chappie' and 'kawaii' and one of the more common phrases being 'plz reveiw ppl!!!' Most of the elderly ones are more than happy to help the younger ones develop into fine writers, thus a strong bond is usually created in a Fanfiction Writer Community.
Most young Fanfiction Writers enjoy having a place to display useless facts about themselves, usually in the form of thousands of contradicting quiz results, on a place called an Author Page. While this display scares many away, a few patient elders will eventually discover, if they haven't been already advertised on every available surface on the forums, stories the young Fanfiction Writer has written.
The rest of this entry has not been submitted due to the author becoming extremely lazy. We are still awaiting the rest of the entry. Hopefully we'll have it within the next five years or so.
* = Yes, it's a blantand rip-off of the Hitchhiker's Guide to the Galaxy.
(To all who liked Caffeine High: Yes, I have started writing again. Along with another idea that's been brewing in my mind for quite some time. Hopefully I'll be able to form it into an actual story.)
Summary: Various HP characters get drunk or high on sugar/caffeine/whatever (as long as it's legal!). Insanity follows. No one's in character. Very random.