Maybe this is more a matter of opinion. Do people commonly intersect objects intentionally, for example a neck cutting into a head to allow the head to be a seperate rotateable object? Is this just considered poor style? Are there problems with it that might develop later? Does it use more resources because it is constantly registering a colision?
I know IPOs set to property would fix this but I want a seperate IPO at the same time for the same object etc.