I installed the RTStock mod to enable the other ground stations around Kerbin to relay radio signals, but I don't want them to relay back to KSC, the purpose for it was o increase range for low-flying satellites and crafts by allowing signa to bounce between satellites and ground stations to reach KSC, something that will be a nice range boost before KEOstationary satellites can be launched, or a tight enough grid of satellites in orbit.
A simple toggle, whether Ground Stations have "landline" between each other, would solve it for me.