"We don't see things as they are, we see things as we are," wrote French diarist Anais Nin. This is not just true of George Zimmerman, the Florida man...
Categorizing women is often used as a way to limit their opportunities further. If we start bandying "mean girls" around as if it's a valid category, we inadvertently imbue it with legitimacy.
Researchers have found that we define a stranger's personality after a mere 10 seconds. With this thin slice of information, we start to think and act differently toward them.