I just noticed you can sometimes change ads for Google Adsense. You can even type in keywords and search for new ads on some of the ad units. So, if you wanted to, you could view some off-topic ads. For example, you could go to a page about blogging to make money on the web and look for ads on magic tricks. Kinda makes the contextual advertising temporarily not contextual.
Wouldn't it be great to be able to change ads on other media? Like TV, radio, or newspaper? If you don't like the ads you see there, just touch them or say something and they'll change to ads you like!
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