I hate to waste electrons on Research Proving Things We Already Knew, but I guess peer-reviewed confirmation is nice to have. An earlier study showed that bullies pick on kids other kids already don't like, so the bullies don't run a chance of offending their own buddies. Now we know that -- controlling for money, race, social skills (as reported by mom), and academic achievement -- bullies pick on fat kids more than normals in the third to fifth grades.
That's how it was when I was in elementary school. It's nice to see a little consistency in life.