This is something that we're in the process of doing, yes ads can be blocked, it's a matter of sending the individual links to Google and advising them that we want those particular ads filtered out.
It takes time, everytime I sign on and see a less than reputable puppy ad I copy the link, when I have a list of about 50 or so they are sent in. Google is huge so it will take some time before we start seeing a decrease in that type of advertising but rest assured we are working on it.
