Yes! At bottom, it's a way to be different. Which is a part of what Tara, the gal who doesn't get the salute right, is doing. Everybody just goes along, a sea of conformity, yet she fails to splay her fingers. It's a tiny sign of rebellion, but the rest of them are too cowed to go any further than that, or to support it. They just know that, if she keeps it up, she'll die in the Agony booth for the ridiculous crime of failing to splay her fingers during a salute.