I've never seen ANYONE using nitrous along with their turbo. He may have the nitrous jets spraying into the intercooler, but I'll drive to wherever you are to see it if he's spraying into the motor. That would take a LOT of precision plumbing and fuel injection, a whole new third party management program and some crazy internal block work.
Also, Z3 fenders aren't functional. That's why people make fun of them.
I know where you're coming from with the whole ricer defense bit. That's unfortunately why a lot of Honda enthusiasts get made fun of: there is an abundance of kids who modify their cars (or try to) and sadly none of them have any idea what they're talking about or what they're doing. Heck, it took me a year of proving my salt in discussion threads on this website to get any sort of acceptance and get past the stereotypes.
FYI, I had a '99 Civic Si with a good amount of engine and suspension work that I had all done myself. There were no external modifications aside from the Koni coilover kit. Best damn coils I've ever driven on.