I'd craft a strongly worded reaction to this garbage (the author compares sexual abuse to "math abuse"), but I hate to repeat myself.
I can only add that John Kellermeier's suggestion that mathematical education abandon its "right" answers and methods would be laughable if it weren't so frighteningly realistic.
This isn't to say that every problem has a unique answer or way of arriving at it. Some problems even have no known answers! But for pedagogical reasons, we tend to give youngsters well-posed, solvable problems that illustrate some specific correct technique.
Is Kellermeier really so humorless and out of touch as not to realize he's imitating Jack Handey?
Instead of having "answers" on a math test, they should just call them "impressions," and if you got a different "impression," so what, can't we all be brothers?
Except I guess you can't say "brothers" anymore. Is "siblings" sufficiently inclusive and diverse?