Collider no longer registers with physics system when disabled

[thatpixelguy]

There are a couple of situations where a Collider will register itself with the physics system when it's disabled. This can cause phantom collisions, which has resulted in the acceleration of a certain programmer's descent into madness.

Example 1:

var collider = entity.AddComponent(new Collider());
collider.Enabled = false;
// later, once entity.Update() is called, the collider will be added to the entity's component list
// and RegisterColliderWithPhysicsSystem() is called, ignoring collider.Enabled

Example 2:

collider.Enabled = false;

// SetLocalOffset ignores collider.Enabled and re-registers it with the physics system.
collider.SetLocalOffset(Vector2.Zero);