In all honesty, if you drove your 'Cuda through Pennsylvania with the blower poking up through the hood the way it is in the photo I would have stopped you, too. It doesn't comply with PA. Vehicle Inspection Requirements, at least not the ones I enforced when I was up there. I had a guy I stopped with a similar setup who was in Western PA. from Eastern Ohio to attend a car show, and he got upset when I stopped him to chat with him about his blower. His argument was that PA. Inspection Law didn't apply to his car because it was registered in Ohio. I politely pointed out to him that we weren't in Ohio at that particular moment, and that the second he crossed the PA. State Line Pennsylvania Law applied to his conduct as well as his vehicle. I didn't write him up, other than to write a Written Warning Notice (which cost him nothing; just indicated we stopped and chatted about the blower in case he was stopped again while he was in PA.) and send him on his way.
Please don't adopt a blanket judgement of all police officers because of the (possible) actions of a few people in uniform.