Some people define passive aggresion by traits, but it is too easy to misattribute traits to malice and make enemies whose hatred towards one another becomes self-fulfilling. In general, we want to avoid ascribing bad intention to others because it only harms our relationships. It might be tempting to return the passive aggression, but making someone taste their own poison also makes us hypocrites.
It is important to respect passive aggressive people and the choices they have made. It is not fruitful to fight them. Instead, surround yourself with positive people.