Who Names The Watchmen?

Wondering why the new trailer for Watchmen » 11/14/08 1:40pm 11/14/08 1:40pm seems to include characters calling the superheroes "the Watchmen"? The original comic stayed away from the word, except for the ominous graffiti that gave the series its title, so is this more squidtastic evidence of the movie moving away from the source material, or just…