One place I worked used a handline for everything! Bucket or not? to me it's safer to send a crossarm up a handline then try and hold on to it while flyin a bucket! When a grunt needs to get under a worker you should be lettin the person in the air know? "In the hole" is what I say and the worker in the air should take note of the persons position and then stop until the area is clear!
To me you'll never be able to stop all accidents EVEN if ya gave every dam tool and piece of material a bucky!:D It's just another hazard of the job that we can only and should TRY to prevent!!!