I have a LG 49UJ670V (european namingscheme, it's the 2017 49 inch 4k model) with the latest WebOS installed.
I was searching for bluetooth devices on my w10 laptop and I saw my tv pop up. I didnt even know i had bluetooth on my tv. Then I looked for the bluetooth option on the TV but appearantly there is non. I thought maybe they called it differently but no. There is simply no way to turn off bluetooth on this version of WebOS. I contacted LG support and they confirmed this.
I don't like to be discoverable for all to see (I live in a apartment complex) with just a simple pin to pair devices. Also this could potentially mean location tracking and device tracking by LG for all my devices which would irritate me even more.