I have heard the same, but like thecop mentioned above, WPD and NHSD have been fully encrypted for a few years now. At one point all of the small town PDs, UNCW and the airport were in the clear, but I think the only PD that still does some comms in the clear is Wrightsville Beach.
I track the system every day, as I work nights in Wilmington and my scanners follow it just fine, minus the encrypted stuff....