I understand why people take the lane during a descent - and I typically stay out of the shoulder for descents for all the reasons mentioned.

However, this is not someone that's going down the hill and it takes her two minutes to do it and people should just be patient. This is someone that's repeatedly lapping a hill - so cars get to wait when she goes up the hill and cars get to wait when she goes down a hill. When you're doing this in someone's neighborhood - it'd be nice to be friendly about it and not be a major road block in one direction or another for an hour or however long she rides. If she's doing it several times in a row, she should have a good idea which pullouts are free of debris and which arent - we all know it only takes a few seconds to swing partly into a pull out and let a car pass you. These pullouts are for cars to use or trucks to let faster people pass them going up or down a hill - so we're not expecting her to do anything that a car driving that same stretch of road wouldn't do.