Casing

I meant to note this earlier; it's from the novel The Cuckoo's Calling, decribing a run-down part of London through which her protagonist is walking (it's part of a list composed of fragments):

Past a sign that advertised "Kills 4 Communities", at which he frowned for a moment before realizing that somebody had swiped the "S".

That simply doesn't work in that character set. If the sign was actually in mixed case, it would now read "kills 4 Communities". If it isn't, the book should read "KILLS 4 COMMUNITIES".