"Less Friendly To Strangers"

So I just noticed my "personality" lists me as "Less Friendly To Strangers". Now I'm not handing out $100 bills to every person I walk past on the street, but I definitely don't feel that describes me at all (nor do any of my friends as this actually made me self-conscious enough to actually ask).

Anyone have any idea what questions might have caused it to think that? I've answered hundreds of questions (many of them years ago, possibly when they were sparkmatch questions and I was an utterly different person...).