Guilt (not signing up)
White feathers (handed out by women to symbolise guilt and shame of not enlisting)
http://www.studentpulse.com/articles/151/the-white-feather-campaign-a-struggle-with-masculinity-during-world-war-i
http://en.wikipedia.org/wiki/White_feather

http://worldwaripropaganda.wordpress.com/

http://www.thecanadianencyclopedia.com/articles/first-world-war-wwi


http://hubpages.com/hub/How-Were-Propaganda-Posters-Used-In-World-War-1

http://www.bbc.co.uk/history/british/britain_wwone/pals_01.shtml