parked domains

Parked domains: is Google wasting your money?

Parked domains are generally low quality resources, housing value-less directories or pages of AdSense ads. Why then is the proportion of AdWords spend that is going to these parked domains on the rise? 

Turning off this source of traffic in AdWords is possible, but hidden away. Therefore Google, as well as the domain owner, is using increasing amounts of your campaign budget on what appears to be low value traffic.