Gents, sorry to reign this thread in, but the issue isn't what your robot should do once it receives an IR signal.
It's receiving an IR command at all!
Waiting for the interference to clear up, and sending a non-time dependent command isn't a viable solution. Neither is sending a "do everything" IR command. Both won't cut it if they never get to the robot.
RoboCoach 1: hits IR command and holds it
RoboCoach 2: hits IR command, it doesn't work. Thinking he can sneak in the command when "interference clears up," he continues to hold the IR command, hoping everyone else will let up, even for a split second.
RoboCoach 1: IR command is now jammed by RoboCoach 2. Thinking he can sneak in the command when "interference clears up," he continues to hold the IR command.
Deadlocked
?