Were you one of those kids who was tormented by a mean girl back in junior high? Well, consider yourself lucky. That's right. Lucky.

See, psychologists from UCLA recently conducted a series of experiments on the effects of mutual dislike among girls using a pool of 2,003 girls in sixth grade -- you know, that wonderful time of life known as the start of puberty. And hazing by women who make the Heathers look like cream puffs.

What they found is that girls who were hostile right back to their frenemies were regarded among peers and teachers as more socially competent -- i.e. they were more admired and considered more popular.

According to Melissa Witkow, a psychologist tied to the study, "When someone dislikes you, it may be adaptive to dislike them back." The idea is that this type of non-shrinking-violet response actually preps young people to recognize and weed out bad seeds as adults.

Of course, it's never too late to start dishing it back. After all, we all have one of those co-workers.