A while back I posted about a slew of identical letters to the editor from Americans in Iraq. It turned out that Lt. Col. Dominic Caraccilo wrote the letters and passed ‘em around to the troops to sign them.
At the time, a couple of the soldiers said he didn’t actually sign the letter. One of them, Shawn Grueser, just posted in the entry linked above confirming that he didn’t sign the letter but saying in no uncertain terms that he would have. I still think you don’t forge a guy’s name without getting his permission, but if Sgt. Grueser doesn’t mind, that’s a pretty strong mitigating factor. And it sounds like he may have been pushed into giving the negative quote he gave at the time.