As a photographer my carry on is always well over the weight..
I've been forced a few times to pull out a camera and load it up with longest lenses/ flash etc etc and have it around my neck.. Its apparently fine to wear your weight but not have it in a bag..
Makes no sense but they've been happy with this - as long as its not in a bag.. As soon as you pass check in it all goes back in the bag..
Have also been told by Virgin that I wasn't allowed to load up my roller kitebag (golf bag) with separate bags inside - "I wasn't allowed to have bags in bags"..