I'm a fan of Wikipedia. There are huge volumes of information on subjects I can get drawn into, and I could easily become lost for days learning about the world's longest aqueducts, unicode layouts for Linear-B (which is an ancestor of Greek with 200 characters; some phonetic, some pictographic), or various artists I'd otherwise never read about. So many volunteer-hours worth of writing, it makes my head spin thinking about it. There are occasional articles that make me wince at how bad they are, and I often have to fight the urge to correct yet another thing here and there, just 'cause I can.
( Anarchy? )
( ...Order? )
( Anarchy? )
( ...Order? )