Kind of reminds me of arguements for or against artificial lures in bass/trout fishing. It's not real fishing if your using real bait. Dry flies vs salmon eggs. Blah blah blah. Seems like a lot of preaching on this site. I think it's a matter of taste. What do you want to convey to your son? (Assuming all was legal as you said it was) Maybe that was a chance for a good conversation with him (a quick one) about why he was hunting, what kind of experience HE wanted. Did he want his first deer to be a drive by happen-stance or the fruit of a well thought out hunt? He may say heck yeah ( Honestly I would have at an early age, and may even now except we have to be 100 yards off a road in VA) but with guided questioning he may opt for a different experience. Who knows you could even try to talk him into a belly crawl stalk, which could turn a lucky pot shot into a challenging opportunity for bragging. That would be fun too even if he didn't get a shot, and exciting.