The biggest problem is when you follow mandatory procedures and are obliged to declare Mayday, Pprune gets hold of it and it is looked on as crew shrieking 'My God, we're in distress! Call out International Rescue, call out the Coastguard, call out everybody with a uniform with a Red Cross!' when it is simply a procedural thing, and compulsory. What is needed is a new word to convey 'low fuel situation- not about to die (but that possibility is not excluded).'
Won't be nearly so exciting in pprune though.