mayb he want to put some colorful LED/UV lights to add some spice to his rig haha..

well for tat u have to sacrifice abit of neatness.. for me i would do his way also.. oni way to make it tidy is to gather up the wires properly and use cable ties..

u can't really hide them all away. but can minimize the obviousness of the wires hanging over everywhere..

place ur HDD cables aside. . best is u could place wires away from them n not overlap them.. will look neater tat way..