Storage of other speakers in the room, shorting them while not in use? Myth or true?

Hi ,I am about to bring another set of speakers to my audio room, I want to leave the unused ones I,m using right now  in the same room..  Is it true that to have them not interact with the acoustics of the room and with the speakers in use I should put them in short ( positive and negative connected ) the unused ones.  I have received that advice from two different audiophiles, one of them with experience in a pro recording studio. Is it real? or is it just a urban legend (aka BS)?