Whenever I read your posts Hot Wings I am always shocked by what you say.
These 'minor grievances' are all the claims for the docking of pay for days after the strikes. For example someone who striked on the last day of the strike and then phoned in to say they were now not on strike had there pay docked for all the days up until they actually worked again. Now I don't know if that is ok or not but I know that the crew that did talk to their managers were actually told by BA to put in a grievance.
In all my years working for BA I have never met someone who has put in a grievance against anyone, so your statement about all these spurious grievances seems very strange to me. Reading your posts I sometimes wonder if we work for the same airline.