When war broke out in 1914,
the British government, through the Parliamentary Recruiting Committee, set about producing posters to swell the ranks of Britain's small professional army with volunteers.
Initially, these posters focused mostly on providing information on how to enlist and on stirring up patriotism. In 1915, though, a number of posters seemingly aimed at shaming (directly or indirectly) men into enlisting appeared.
The Wiki article says:
Stéphane Audoin-Rouzeau and Annette Becker have written that the campaign of mass propaganda, including what they describe as the "guilt-inducing and brutal messages" such as "Daddy, what did YOU do in the Great War?" were not the only contributing factor to these recruitment figures, writing that recruiters "quickly decided that using the latest forms of mass advertising had a negative effect".
The above passage isn't very clear about whether or not these posters helped or hindered recruitment and, as SJuan and Pieter Geerkens have pointed out in their comments, the stats appear to have been misused.
While it is true that later posters switched emphasis, the obvious reason for this was that conscription was introduced in 1916 so this kind of 'persuasion' was no longer necessary.
Did these kinds of posters, on balance, have a negative effect?
Are there any primary sources from the Parliamentary Recruiting Committee citing evidence of this 'negative effect'?
Were there any newspaper editorials (for example) or prominent people who voiced opposition to such posters as the ones cited here?