I've used 3 ppc engines so far, and i always see non-relevant listings when i'm checking out the keywords. So, today i spoke with a person from the one i'm using currently, and asked him do they ever check for relevancy. He said they do, but i can email them any keywords that i notice with non-relevant ads. Have any of you folks ever done that? Is it a waste of time, or will they actually remove ads that don't belong there? I advertise adult sites, and it pisses me off that people advertise under the wrong categories.