there is a blocklist for LG Smart-TV features available [1], intended for use with the PiHole software [2], which is a popular and easy-to-use network level firewall.

[1] https://gist.github.com/wassname/78eeaaad299dc4cddd04e372f20...

[2] https://pi-hole.net/

You can, but I use the built in smart tv apps because they are the best at preventing burn in, which i'm paranoid about.

I'm away from home, and I set it up nearly 2 years ago, but I recall there are settings to disable tracking/targeting, etc. And I recall the opt in for voice search was so scary that I've never enabled it.

You can not accept all the terms and conditions prompts. This disables some features but also disables tracking. I didn't agree because the terms are awful. It's unfortunate that features (like voice) are tied to this but honestly it's not a deal breaker.