WAH 51 - Anecdotal Evidence

The episode talks about the moral decay of German teenagers by citing some reported examples of German teens misbehaving.

But are the cited examples truly indicative of larger trends? Or are they simply the result of a few uptight Nazis who are especially sensitive and prone to report on these types of moral lapses in others?

It would be helpful to quantify or cite large scale incidents of these kinds to support the point.