I take many web-based surveys for e-rewards (because my opinion is important — and they pay me in GameStop gift cards which I use to feed my video game addiction) and having done countless numbers of these, I sometimes go on auto-pilot.
Recently when I was asked to enter the year of my birth, I entered my zip code. Instead of rejecting my answer as out-of-bounds, the site kicked me back to the home page as being not the target demographic for the survey.
Because it thinks I am a time-traveling survey-taker from the year 60,626.