Anyone who owns an LG smart TV must inform all guests and family members that they are being monitored – this is required by LG’s current terms of use. Meanwhile, LG monitors install potential malware and surveillance software on a connected Windows computer.
Smart TVs do not magically connect to your WiFi without credentials.
Now if there is an open WiFi available, that might be a way or if the TV has a deal with a carrier to use all that open automatic WiFi.