This is a bad thing.
Part 4 - Making Play More Friendly
Chapter 1 - New Commands
Section 1 - Echo-location
Understand "shout [text] to/at/for [any person]" as answering it that (with nouns reversed).
This was written by the genius (that is not sarcastic) interactive fiction author Emily Short, in her short "Beauty and the Beast" spinoff, Bronze.
As far as I can tell, it means "when the player enters a command such as "shout Hello at Bob", the 'answer' action should be invoked with the first argument being Bob and the second argument being the text "Hello". Maybe.