i don't know...i don't get it for the everyday guys, i've never been secretive....the only thing you won't get out of me is the specs on my cam...other than that i could careless
now the grudge racers i can understand....we work with a few of the 1/8th mile outlaw track guys at the shop and understandably they don't pop hoods, always run n/t's, and are very secretive, to the point that they send friends of a friend of a friend to get their nitrous filled kind of secretive....we have done a lot of setting up, installs, etc that we have kept secret to this day and will continue to do so...but like i said, for the everyday guy, especially someone claiming to be n/a, not popping the hood is suspicious...though really the only thing you can hide on a n/a car would be nitrous and if the person were smart enough that could be completely hidden as well, you'd be surprised to know how many street cars are floating around with solenoids mounted in the fender area and bottles mounted inside of body panels