Root or the foundation was often looked at as the dark swat team for Konoha....so how many ninja were actually a part of it 40-50-100???? In the 4th shinobi war we see around 80k ninja fighting. So estimating that konoha has around 16-18k of them, how many were a part of the ROOT??? Why didn't anyone oust danzo and ROOT if they knew of its existence despite Sandaime disbanding it???? I mean they did try to assassinate Hiruzen.....