Luckily it's illegal to ride a bicycle on sidewalks in my country and yet many people do it at half the speed and half the comfort of what they would have on the road (sidewalks are not maintained to be smooth and are cluttered by all sort of things and people.) I'm a cyclist and I really hate them. If they are afraid to ride on the road, it sucks for them but it's only one of the things people would like to do and cannot do. Walk, catch a bus, drive a car.