I think I know why the OP made this post - you get on a plane and find that once you get to your seat there is no room in the overhead locker because of crew bags. I agree, it's not acceptable. Crew bags should be stored in dedicated crew baggage area. My suggestion would be to complain to the operator. It's up to them to provide their crew with sufficient space to store their (required) bags - space which doesn't impinge on passenger bag storage.