The ads you see on various websites are driven by the pages you visit. For example, I have been looking at baby stuff for my sister and I searched for a phone number to schedule maintenance for my car. All of my ads are for Disney, Infiniti and Babies R Us. So, if somebody has been perusing "particular sites", looking up stuff for Filthy Shades of Gray or Googling certain images, that would prompt for you to get those type of ads. If that is not you doing that, your computer just told on somebody else in your house.
If WDW Info/Disboards could select the ads, I assure you this is not what they would choose.