I played a round at Heritage Point, when a guy in my foursome put a ball into a large window of a house backing on #9 (the "Island" Hole). The homeowner (older lady) was waiting for us on the balcony with a ball in her hand. She looked furious. The guy came over, said he was sorry, told her his name and phone number, left his business card on the grass of her backyard, then asked her to have the window replaced and send the bill to him. She nodded and turned around to go back into the house. The guy shouted: "Excuse me, can I have my ball back, please?".
Golf courses are responsible for all damages to the property. One of the more infamous cases in Calgary - Willow Park Golf Course got sued by a homeowner, defended itself vigorously on account of the "owner should have known when bought a house", lost, appealed and lost again. As a result, the course had to re-arrange and re-build its entire driving range and a couple of holes to accommodate a safer design spending millions of dollars. Golf Courses try to hold members accountable to the damages they cause; but it's a self-policing honour system supported by other members' watching each other and supposedly reporting on those who don't.