In Internet culture, a lurker is a person who reads discussions on a message board, newsgroup, chatroom, file sharing or other interactive system, but rarely or never participates actively. Research indicates that "lurkers make up over 90% of online groups" (Nonnecke & Preece 2000). Lack of trust represents one of the reasons explaining lurking behaviour (Ridings, Gefen & Arinze 2006).