Your idea wouldn't work, Groteske. Commercial makers pay to have the best slot times so that their commercials play during a certain show.
Ever notice why the Superbowl only has the biggest of companies advertising? Because they're the only ones that can afford it. If companies just advertised for eight hours straight then nobody would bother watching it and they would just be wasting money. Like house buying, it's all location, location, location.
If you don't like commercials most cable services allow you to record TV shows... Record what you want and fast forward through the commercials?