Is there a way to add a world particle collider to a particle system through script. AddComponent(???);

If there's not a way to add it at runtime is there a way to enable/disable it?

Add it to the actual particle effect, then you can enable/disable it...

Use get component

http://unity3d.com/support/documentation/ScriptReference/GameObject.html

To get the component, and just .enable = false/true on which you want..

Should work =). Good luck!

Code:

function Update () {
    if(Input.GetKeyDown("w")){
        var test = gameObject.GetComponent("WorldParticleCollider");
        print(test);
    }
}