Background
Where did the idea of the LART come from? Well most likely it was inspired from the Bastard Operator from Hell stories circulating as the Internet grew from an academic/military experiment into the vital communcation form we know today. The classic BOFH stories capture a slice of behind the scenes IT culture, of the variety that make regular computer users scratch their heads and blanch that someone may *actually* do such things, and makes the people that work as sysops and sysadmins laugh their heads off. The Register keeps the more current BOFH stories here.
Of course you cannot have a LART without the Luser, which predates the LART by an unknown amount of time.
Why LARTS?
Every office I have worked at has had a LART of some form or other. Some are big sticks, others are tile pullers. Regardless, if your office doesn't have one, it should. What else do you point to when someone asks you the same question ten times in a row, and even if you want to be nice it just isn't always possible? Where else do the imaginings of sysadmins become physical things instead of ideas running around in the electrosphere?
encouraging exellence in LART implementation and design since 2007