But be fair most judges usually bend over backwards to see that a defendant gets a fair trial. A lot of them lean towards the defence most of the time. Well from general observation that is. But as has been pointed out to me in no uncertain terms, I know nothing. 
I suppose Grahame like most things in life, there are good and bad judges. I would imagine now that it is not monopolised by the upper classes there are no doubt more aware and imaginative judges. They are not just sitting on high judging the hoi palloi.
Should imagine also that they have to work within guidelines that they may find prohibitive....there is however, the ones with personality disorders who are socio/psycho and have climbed that steep ladder, stamping on everyone on the way to attain their position of power. There must be a percentage as there is in all positions of power.