Thats sad that they dont control it. Near ad low right corner you find "?". click it. It says: At Jagex, we strive to maintain a quality and consistency in the adverts shown on our website, and regularly maintain checks to ensure that those adverts we show are suitable for all of our players.
If for any reason you feel that an advert being shown is inappropriate, please contact us by clicking to comment on our service from the main home page. After you have logged in, please select to send us an Advert Complaint.
When asked to supply an Advert ID, you can find this by clicking the question mark next to the offending advert to display this message. The ID to be provided will then be shown next to the yellow text at the top. Thank you. Seems Jagex counts on users to report bad ads. Though money runs into Jagex pocket.