Given the fact that the state government of Maine, the University of Maine system, and the University of Maine at Orono all refer to the latter at the "flagship" campus of the system, perhaps you can suggest a more authoritative source to refute these "opinions" or a more reliable source to substantiate the statement? I see absolutely no reason why we should report anything but the fact that the University of Maine is the flagship campus of the system. It's a largely meaningless distinction, but a neutral and objective fact readily demonstrated by a preponderance of reliable and authoritative sources with absolutely no neutrality problems besides those you choose to project upon it.