I've had rebels stand around in my lands for 20+ turns. I don't think they'll ever attack me. I don't have a problem with them. My Baktria campaign saw two uprisings in my indian provinces. I quickly took the cities back however, and kept garrisons in them afterwards. It drew my armies from the selucid front and proved to be a cool obsticale. I needed to move my armies, separate them, and bring them back to battle the Selucid empire.