Dave Waite - Thanks for the details of the Yellow-Pressmen. Wikipedia describes them as "a type of journalism that presents little or no legitimate well-researched news and instead uses eye-catching headlines to sell more newspapers. Techniques may include exaggerations of news events, scandal-mongering, or sensationalism." Nothing changes.
Although some journalists did visit the battlefields I have only found references to these being carefully orchestrated escorted tours. The Times refers to the 'Glorious retreat from Mons' as a euphemism for a series of defeats that left some of the BEF battalions with losses of more than 50%, and even in 1917 was describing the terrible fighting on the Somme of the previous August with phrases such as 'we had made considerable progress' (although they were yet to capture the objectives of the first day) and 'our soldiers were full of confidence and elated by their successes'. The journalist who wrote that cannot have been anywhere near the troops that Sassoon describes in Memoirs of an Infantry Officer. Maybe not cowardice; unquestioning ignorance perhaps.
The 'trusty bombers' are, of course, the men such as those whom Sassoon commanded. He describes sending a messenger for more bombers when he led an attack at Mametz Wood. They were armed with the Mills bomb.

The idea of bringing war to those in Enland who supported the fighting without any understanding of its reality is also approached in Sassoon's 'Blighters'
'I’d like to see a Tank come down the stalls,
Lurching to rag-time tunes, or ‘Home, sweet Home’,
And there’d be no more jokes in Music-halls
To mock the riddled corpses round Bapaume.'

I-Like-Rhymes - Whilst your thoughts may match up with some aspects of Sassoon's poems (and presumably his thoughts) your comment shows a misunderstanding of some of his words.
Yellow-Pressmen does not indicate cowardice but merely writers for the Yellow-Press (a particular form of journalsim) Sassoon knew, as did his readers at the time, that the more respectable journalists and war correspondents actually went to the battlefield themselves. No cowardice there. Ref http://en.wikipedia.org/wiki/Yellow_journalism
Also the trusty bombers refers to a bunch of friends (armed with grenades no doubt) and not to the weapons themselves.
Jim

Dave Waite - The media has a lot to answer for. For the soldiers, charging the journalists with bayonets is a cushy (easy) job, to match the cushy jobs they have had writing lies in the newspapers. The pressmen are yellow (cowardly) and grunt and squeal. It is no coincidence that these are the noises of pigs. Having wiped out those who stayed safe at home to report on a war they knew nothing about, Sassoon dreams of throwing grenades at the politicians. Fox News take note.