A:Answer I found a way to "restrict" others to connect to my LG SH7 soundbar via bluetooth. The problem is, this prevents everyone, including me as well to connect to it but since I've never used and not planning to use it this way (TV connected via optical, fully functional controlled from TV remote).
Very easily just unplug the soundbar, screw out the 22 phillips head screws (remember the order because they are not the same length). Get the bottom off and on the side there is the bluetooth extension card separately from the main board all in its glory. Like they did intentionally separated it for this purpose. Lift up the ribbon cable holder and pull out the ribbon cable from the bluetooth card. Put back the bottom, screw it together and job done, bluetooth not working anymore but the soundbar is functional as it is.
Also the subwoofer uses something else than bluetooth luckily, so you don't use the wireless subwoofer!
Later models after SH7 has a built in functionality to prevent unknown connects, SH7 does NOT. I tried several methods, reseting and disabling connections, but someone from the house is still connecting and broadcasting audio sometimes. Only disconnection of the bluetooth card had a proper effect.
