Nah I think there's definitely a limit, otherwise Tobi would have made the whole edo army have 1rinnegan and 1sharingan.
I Think you would overload there brains with so much sensory input, especially when they are not borne with it. The confusion it would cost trying to sort out what everyone is seeing at the same time.
Interesting thought, but its humanly not possible. (I am however keeping in mind that this is an anime and most rules of physics don't apply).
if this is true than why doesnt every ninja in the manag know this justsu lol
well, my guess was that everyone would have it individually