Costco rave

I went into Costco and I seen the biggest speakers I could find and decided to try the new Sony rave system out I decided to connect it up to my Bluetooth and you can control the full system with the phone they were all running to turn it off why I was watching a few isles up then I turned it back on and they announced over the speakers please stop turning the system up as it is disturbing our shoppers who ever it is why I was in tears a few isles up