Have you noticed this?
All the young 'uns carry haversacks these days.
And all of them wear the straps extended to their maximum, so that the bag hangs really low, butt level or thereabouts.
(Decidedly unergonomic, and also bad for their backs, except bags are never packed full - about three slim books and pencil box or whatever it is they carry in them seems to be the load.)
So is this Generation Zed's version of this blog's contemporaries' expression of our individuality: every one of us wearing our caps backwards, never mind about the sun in our eyes?