I don't think they know what to do with the data over gun that won't disrupt the way they normally play. Personally, I would like to see a data standard set for the transmission of information. It's beyond obvious to anyone who seriously looked into it that you would use Manchester encoding return to zero for the most reliable transmission. The format of the data is set by how much you can reliably transmit and what you want to do with it. Most people like the Idea of variable damage, some like armor penetration, and some like gun ID's.
Most people just cna't think of what to do with data over the gun.
Andy throws a grenade down behind him. Since his sensor ignores his own gun code, he has the grenade transmit the code. Everybody else takes a hit, and Andy walks away.