My girls went to parochial school that banned what they called extreme hairstyles and unnatural colors. My guess is that the girl has had red hair for 3 years but now it's one of those bold, bright, crayon red colors that are so popular. It's no longer a natural looking color. That's my guess anyway. The school must have at least one or two real red heads, the story didn't say they sent them home. It really doesn't matter. The rule NOW is no weird hair colors. My only issue is that they waited until school was in session and sent kids home for breaking a rule they didn't know existed. Notification, with examples, should have gone out to parents before school started.