Hard to say which was in worse taste: The vulgar, amateurish puns that marked “Youth Quake,” a story in the new Fall edition of the New York Times fashion magazine T, or the subject itself — a look at the March riots in London (the earlier ones over school fees, not the ones of August) from a…fashion perspective. “What do you wear when protest and mayhem rock your world? ” asked the subhead. (Photo by Facundo Arrizabalaga.)