I;ve been wondering the same - though for a vastly different reason. Issues w/ getting copied Word verbiage to paste into an article.

But my followers are mostly unknown to me lately ONE I recognized. Others, clueless why they're followers because it's not like they're commenting. That I'm aware of - I AM a gal who's chronically behind on notifications

Also, I will check those I follow and see if they're strangers, too! Yikes