Black Mirror. The ads pause if you're not paying attention.
So it blows you away while ads run and you don't understand any word of the movie.
Don't worry, we also do this in the US.
They increase the volume of the adverts in comparison to the show. Often it is not subtle. Aside from the abysmal and declining information density of TV, it's a key reason I've not had antenna/cable for almost two decades now. The big screen is just a big monitor.
Of course, as you mention, they can just peg the sound levels in across all frequency bands on all tracks in the ad, and yes, it does sound louder that way.
Of course, if they actually want to get people's attention so they try to listen, they should whisper.