Relax, Rollin. The "Rat Rod" mentality has made it into the minibike world. I suggest that was built intentionally with the visual shock value in the builder's head. The rat rod mentality is slowly fading out of the old car scene, and it will go away in the minibike crowd, too.
I applaud his "creativity" at using bit and pieces of what's on hand, but like some rat rods I've seen, one would be worried about driving it down a back alley, let alone out in traffic, and pipe is notoriously soft.
Roger