The beauty of a forum is that debate is never over..
It should be apparent, if you look around LM, there are no set rules in this place. For a reason. Flexibility is important, and every situation requires a bit of adjustment. If we set a hard and fast rule, and something doesn't match it, and we change it; how hard and fast is that rule?
Again, as said many times, use common sense. The rest will take care of itself.