I’m not sure this is any worse then sending that fax via the ACLU or other group trying to make it easy for people to express their support for some issue:

A series of letters to hometown newspapers, purportedly written by U.S. soldiers in Iraq, contain identical language, according to the Gannett News Service. The letters praise the U.S. effort to rebuild the war-torn Mideast nation.

Except that, though some soldiers agreed with the letters, they did not know they were being sent on their behalf and in other cases letters appear to be completely made up.