Web techie type over here. Absolutely agree that it sucks. Though ad content is nothing to do with the particular site, but the ad spaces on web pages are auto-populated based on what you search for and the sites you visit - so a lot of ladies who search for TTC, babies etc will get fertility related ads. Agree though B+B should maybe look at special ad filters to reduce the kind of things shown, I'm sure there's a way they could do that but it might be expensive - and ads are presumably the only way they get revenue...
Personally though, I never see them. If using a computer, you can install something called AdBlock and it takes away pretty much all adverts from sites. Just Google it, hit install, and the plague of targeted ads is vastly reduced. No good for phones though, although there's probably an app...