re: Hear, hear!
It's an exaggerated and misguided, and extremely destructive attempt to be fair to perceived abused minorities. Not only is it unfair and hypocritical to everyone concerned, it is especially destructive to members of those minorities who are sincerely trying to do the right thing, often when faced by ferocious peer pressure.
Of course, it isn't just minorities that take advantage of this situation. It's pretty much endemic now, the only actual cases I have direct knowledge of are all white, middle-class kids, whose parents look you straight in the eye and tell you their hoodlum kid is in trouble because some teacher has it in for him.