See, this quiz was adapted from a quiz from the 1950s. Simply remove heterosexual and put in 'mixed'. It was adapted from people trying to 'push the communist agenda' of blacks and whites marrying/dating as being just fine.
It was viewed just as disgusting and 'inappropriate' at that time as this is now.
That is how it related to education. It is very much in a society's best interest to not raise the next generation to be as bigoted and hateful as the last. The very fact people are outraged about it proves the point.
Straight people are allowed to get pissed off about this quiz. Their right as firstclass citizens in our society.
GLBT people asked these questions every day are just supposed to shutup and fucking take it, damnit, because that's just how things are.
Maybe, just maybe, it doesn't have to be that way. Or maybe that's too much to ask.