Under NCAA rules, trying to swipe at the ball would do no good. By Rule 2-23-f, Team B is not permitted to touch the ball until it has been snapped, which means it leaves the snapper's hand(s). If B is attempting to swat the ball out of the snapper's hand(s), and they contact the ball, the ball remains dead, and B's illegal interference is penalized for delay of game - THE FIRST TIME. After the first time, with appropriate notification (warning) to the Team B head coach, a repeat of such illegal interference would allow the R to invoke 9-2-3-c, and take any action he believes is equitable. I'd penalize 15 yards, with a first down, set the play clock to 40, and start both clocks on the RFP. For infractions after that, you 'could' forfeit the game, but I'd probably just keep penalizing and winding. The game clock will eventually run out, and B couldn't stop it.
Also, I wouldn't get too picky about whether B contacted the ball, or just the snapper's arms. Don't let him interfere with the snap.