Lookie at Sneakers O'Toole's account (an easter egg test account btw)
You'll notice that he has the yearling badge, yet the yearling badge states "Active member for a year earning at least 200 reputation". He currently only has a reputation of 101 and he has never gotten any reputation from questions or answers. Though he may be considered active since he was seen a few months ago logged in.
Is this just because the user is so old or is this an actual bug in the Yearling Badge checking?