You're grouping people born between 1982 and 2000: so around 12 years old to 30 years old. Would any other research suggest that these groups of people act the same or have the same concept of "online privacy".
I think you'd be closer to the mark if you changed to the poll to "reputation management". The older you get, the less likely you are to be concerned about potentially embarrassing statements or photos being posted, and maybe the opposite - I'm probably in that 61% of 30-49 year olds who believe we've "still got it"!