He's definitely going to have to learn that regardless of how much 'treatment' he gets from the oppo he can't come up swinging. Maybe he was harshly treated but its up to him to get up and play on. He's a big unit and can obviously cause some damage to others teams but if he's constantly going to give away pens the good will pale with the bad.
Every team in RL will niggle him and its how he reacts to this that will be the make or break.
PS. Good tactic by Agar, it will definitely gain him some protection by the next ref, but not a lot.