I went up the standard route on Hood last week, and frankly, would not have gone had I known what the rock fall situation was like. There were large rocks littering the snow around us from about 9000 feet to the summit. The nastiest area is the snow chute you climb through ( I think this might be called "pearly gates") right before you get to the summit. There is a sand pile loaded with hurking boulders perched precariously on one another, and it's right above you. Plus, people tend to bottleneck in this area, so it's difficult to move as quickly as you should. I'm surprised there aren't more serious injuries here considering the number of people trekking through there every day.
I would only do this route in winter/early spring. Also, I would pack skis/snowboard and stash at the top of the ski runs. The hike back down was looooong!