Would it make a difference to your decisions for each scenario if the blue player dragged the red player into touch by grasping him by the collar?
For me matey there are two styles of collar drag ...... Neither particularly impressive, but I'll try and explain how i differentiate my line
In adults...& representative juniors
A) a top of the shoulder/collar drag that takes the player in a straight line drag alligned with his spine-line ( ie the collar does not pull against/choke or squeeze the neck.
I wouldn't penalise but I would tell the perpetrator to be very very carefully.
B) Any collar pull that drags the players neck in a different direction. The kind of collar jerk/yank/bend that could damage the neck.
PK minimum and admonishment, or YC/RC depending on severity.
In juniors below representative
PK as a minimum. For all deterrent reasoning.
My rationale is
Neck contact or above , is the Law benchmark, & applies here also.IMO.