As I get older, I'm really learning that ignoring people is a whole different level of power. Some people will say and do the weirdest, most low things just to get a reaction out of you, and once you see that for what it is, you stop feeling like you have to prove a point. Silence really does more than any response ever could.
Disliking someone is okay but lying about their character to others to get people to validate your weird behavior towards them is a sign of pure wickedness.