Answer
This is a derogatory term used by some system administrators to refer to interactions with end users during which they are required to muzzle, remove or in some way change the user from their present course of action.
LART = Luser Attitude Readjustment Tool
Luser is also noted as L-User and refers to the end user. The "L" is added by some administrators as a derogatory way of referring to end users with little or no knowledge about technology.
Keywords:end user l-user luser attitude readjustment tool