Not in our experience. They actually don't interact much with passengers and don't talk all that much. They will stop and let you take photos and stay in character, but the ones without assisting cast members are more "distant" and just roaming around as if they are just monitoring or searching for something. The Jawa, on the other hand, interact with passengers and they have a CM assisting them. At the ticketed events, they do interact with you. Just watch out for Captain Phasma.