It looks like the rumor/invented story to sell magazines that "misses Kristen Stewart everyday" is exactly that, after Pattinson admitted in an interview with Sunday Style that he doesn't forgive those who cross him:
I don't ever feel the need to forgive or expect people to be. I judge people on their actions. I don't really care if it's wrong or right, I give them the benefit of the doubt. If they do something I can't be bothered to deal with, I just cut them out.
Did you hear that people? If you do something he doesn't like, RPattz will cut you out of his life and never talk to you again. So clearly KStew has been getting the silent treatment, right?
Of course there's a chance that Rob wasn't actually referring to Kristen with his threats of indifference. Maybe his barbs were armed at the pizza delivery boy who forgot to add anchovies even though he expressly asked for them because the extra Omega-3 keeps his hair looking lush. Or perhaps he's literally threatening to cut people out, as in stabbing them in the stomach and spilling their entrails all over the floor in front of them. Unless he's more specific we'll never know for sure.