There's still the question of how exactly these techs came across the images, but there's not any info available on that.
Identity theft is one thing. There's also the peeping tom element. Can hotel maintenance staff be charged for peeking at hotel guests in their rooms from a hidden location while fixing the vents? Sure. Can department store staff be prosecuted for peeking at customers removing their clothing in changing rooms? Absolutely. The question here is whether computer technicians working on home computers can be charged for leering into computer hard drives while carrying out repair work.