Quite a lot of TVs used to have terrible consumption if you enabled certain features. Things like over the air TV schedule updates. This was dumb, because those things only needed to be scanned for infrequently, but the TVs just went into a fairly high consumption mode continuously. Newer TVs seem to have fixed this, and just look for updates in short bursts. The manual for our 1 year old LG's still talks about possible high consumption when certain features are enabled. I've monitored its consumption, and they really don't have much overall effect. They just consume in infrequent bursts.
One dumb thing is the smart remote control for an LG TV does everything but turn on/off the TV by radio, but turns the TV on/off by ye olde worlde IR method. This is really annoying, as our TV has an AV receiver sitting in front and below the TV, that just obscures the IR receiver. So, we have to hold the remote control high up, pointing down, to turn the set on, then everything else is controllable comfortably. If you have 2 screens within range it gets really annoying, as the IR is not selective, but the radio functions are. So two remote controls control 2 side by side screens independently, except for turning them on and off.