Strategic bombardment fromt he air was still new enough experience that there weren't any bomb shelters (that is, no effort to provide civilians with such); people sheltered in their basements and such like, as they desired. Some Londoners, in a preview of the Second World War, took shelter in the subways.
The National Air & Space Museum, in its Aviation int he First World War gallery, has a German propaganda poster, with a picture of a dirigible hovering over London, searchlights blaring, trying to find it, and a huge crowd, panicked and running for the tube entrance. The caption reads, "Zeppelin kommt!" (The Zeppelin is coming!).
In fact, there is no record of anyone panicking due to an air raid, either by dirigibles, or by fixed-wing aircraft; although one of the earliest civilian deaths in Britain is that of an old lady by heart attack, claimed to have been brought onto by the shock of being bombed from the air.
British civilians were often slow to take cover, in fact: several of the casualties atributed to German bombs, were in fact, caused by falling pieces of anti-aircraft shells.


While the number of dirigibles (not by a long shot were all of them "Zeppelins") imagined destroyed to date was far in excess of those that actually were, the actual number is quibbling. You point still stands. And from there, we can logically proceed to those killed and maimed at sea, in the wasteful Battles of the Somme & Verdun on the Western front, the something like 12 Battles of the Isonzo in Italy, the failed offensives by Russia in Eastern Europe, the...yeah, the list really is never ending.

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