be careful who you dob in!!!!!
I would be very careful who you report intimidation to as if you cannot take criticism on the chin under these circumstances then how will you go if you fail your first line check because you were not up to speed?
Would you call a manager and cry into the phone that the checky was a union guy who set himself the goal of holding you down for more training? Be very careful because not all of the trainers are in the union and so if you go running to the nearest manager complaining that you failed a checkride based on the premace that it was union intimidation when it actually might have been your own stupid fault, then you are left in a very sticky situation for the rest of your career aren't you.
Tell me how you would feel dobbing in the wrong guy who wasn't union that you so mistakenly thought was?
I would be looking over my back for ever after such a boo boo as that.....
The best advice i can give you is to keep your head down and don't think you are doing any favours by dobbing people in. What happens on the day the captain is really pissed off at something completely different but your guilt makes you think he is mad at you?
Just keep your head down and your mouth shut and you will be around for many years to come!