That's actually kind of heartwarming. Harry's actually concerned about us. Despite the fact that we're a complete jerk, have, at no point, shown even the slightest hint of wanting to change, and have had no (visible) outside catalyst for forcing us to change. That big a personality shift isn't exactly normal for Dudley, and the fact that he's worried about us means he deserves better than being punched.
On the other hand, we're still a jerk, so I vote we split the middle and troll him.
[x] Give him a sandwhich and invite him into your room.
-->[x] Pretend to be a Bond Villain caught in the act just like in one of those movies Daddy likes to watch