Really interesting discussion--thanks for all the replies. I expect I'll continue to hop off the bike, because the neighboring dogs are all curious, not vicious. I do clicker training with my pit bulls, so who knows--maybe I'll bring hot dogs and a clicker along on my next ride and start training the one dog in particular who is bothering me. Or maybe I'll knock on the door and tell the owner how dangerous for the dog it is when the dog runs into the road.