Your LG Smart TV just phoned home
I'd be surprised if it were only LG who are doing this.
Apparently "viewing habits" include filenames on USB devices connected to the TV as well.
And they're "investigating"? They know what they're doing, they just need time to cook up a bunch of excuses. The UK blogger who found out about this already received a reply from their customer "service" that it's their retailer's job to inform customers about data collection. If I've understood correctly, that's their only possible escape in the UK as all such info must be presented at point of sale. Any later (such as showing pages of terms and conditions when you power up the device for the first time) and it's legally not binding.