Has anyone claimed the rebadging process is voluntary?
Yes. The process is described as voluntary on the SF85 and SF85P forms, and by NASA Administrator Michael Griffin and JPL Director Charles Elachi. Doug Sanders of the JPL Ethics office states that it is voluntary because the definition of “voluntary” involves a choice, and here there is a choice between terminating employment and complying with HSPD-12. By this reasoning, handing over your wallet to a mugger also would be voluntary when he offers the choice of “your money or your life.