that's funny on the window net.... the chassis guy I use has put nets on the last two cages I've had built (10+sec cars) and that's EXACTLY the reason why.... "some tech guy somewhere will hassle you about the net" :)
Just read the tech book, print the page, or get an email back from NHRA central and print it, put it in your book (or in the car) with all your other info then there won't be a discussion about it again with any tech.