Augmenting crew dont have set /standardized "jobs" to do ,,,if its ad-hoc ,,,it will be looking for an accident to happen ! Distractions are up there in the causal factors leading to accidents. Awareness, situational or otherwise, cause their fair share of prangs ,,,, and this is coming from a Cessna 150 pilot !!! You are either an INTEGRAL part of the crew on that segment OR you are NOT !!!!