It has got to the stage you nearly need to
seo your adword landing pages for google to make them relative to the product or service you are selling. I think you will find that if you stay off the first 10 listings of adwords the clicks will be more focused. Let me give you an example. A company used adwords to sell mobile phones, during the last world cup they ran an adword as usual but ran keywords like football results, fifa, etc. All adds were pulled by google as being non relevant to the product.