These people you talk of AoA who taxi around with their landing lights off have a special name - they are Jedi Knights. They should be banished to a galaxy far, far away because their medieval magic and the "Force" has no place on planet Earth.
Turn off your light when it affects anybody else’s field of vision or when your light inflicts on a landing area.
In some light aircraft and most bigger aircraft you have two lights - a landing light and a taxi light. The taxi light is not as bright and is pointed down at a slight angle to permit viewing under the nose. However, if you only have the one light it serves both purposes.