A member of a forum that has extra rights and abilities to "keep the peace" and enact the rules set forth by the website admin or owners. Is most oftentimes (98%) a nerd that got his ass beat in high school and feels that, through the only authority he will ever obtain, he must take it out on "normies" and the rest of the world, by enforcing pointless rules. Usually in real life, they don't do well in direct sunlight and can't backup any confidence in real life.
Usually forum moderators that follow the rules strictly or more than a passive/collected moderator are enormously boring in real life, but think they are interesting and liked because of their personalities on the internet world. They don't realize it's the same reason why people try to make "friends" with a police officer.
"I couldn't figure out why I didn't have any cool friends, so I became a forum moderator in order to take my pain out on the world."