Forget it Buster. He will just insult you.
Petrus is a playground brawler. Maybe you recall the kind. 12-years-old, usually a weight problem or some other perceived social deficiency which is compensated for through the launch of attacks on a minority, since he knows he is backed up by his friends, in this case, with reaction emojis which, although entirely superficial, still empower him since he receives very little of it from the real rather than cyber world in which he can bully with anonymity. 

He also knows that, some reason, the NCR moderators always give him great deal of latitude.

Given that most of the commentators here are pro-SNAP and Petrus rabidly so, that could explain why or I sense that he has some sort of personal issue. Perhaps, as I am beginning to do, they pity him for it in the same way one pities an individual with Turrets.
So, while he will just try to bait you with impunity, I'm afraid any counter move by you will be viewed as "not meeting civility standards/"