Hit 'em where it hurts
Ever since I became aware of this practice (which only seems to have creeped in within the past few years... I don't remember having this problem pre-Sky Digital), I have devised my own solution. It's called the mute button. Yes, it is intensively manual and entirely impractical.
The thinking behind the loud adverts, however, is along the lines that you will have gone out of the kitchen to make a cup of tea, so the advert needs to be louder for you to hear it (alongside the usual "louder means you'll take more notice"). Hence, muting all adverts entirely (which I have now developed into an unconcious habit) removes any and all advertising revenue that they would otherwise have had. I keep a "dip-into" book on the armchair just for advert breaks. It's also a great time to check email.
And without the distraction of noisy adverts, I can actually do those things. When the adverts were audible, I wouldn't do that, I would just leave them on and end up unconsciously tapping their theme tune, or finishing their slogans.
I've also complained to a couple of particular channels but you never get anything useful come back. It's nice to see someone actually doing something, though. Pity it took so bloody long.
Oh, and thank you UK Gold for giving me a clear signal of when programming is going to resume to normal for me to un-mute (the big "splashscreens" just after the adverts finish), but if you don't stop talking over the first 30 seconds of my favourite programs, I may have to resort to just playing my DVD archive copies of them instead! (which, incidentally, I have made copies of in order to remove all the prohibitions on what trailers/splashscreens I can skip or not... another "brilliant" advertising strategy that has more-than-backfired!).