In AV/IOC/WG, if you are in my way to prevent me from getting any objective, red is dead. If I have the objective, I will let you sit there and stare all you want and probably won't attack unless you make hostile actions.

Out in wild (world PVP), I play on PVE server, so if you flag and are bigger than me, I will attack you. If you are same size or smaller, I will just avoid you (pets on passive and just move out of your way, even if you attack).

In a capital or world PVP with a purpse (large scale actual world PVP), if you have a mana bar, you are dead (most times healers). If you seem tough or mean (huge HP tank or such), then I will go after you.

Simple version, if you are in my way, or trying to stop me, I will probably kill you, otherwise, I will mostly avoid you.