> Where / How are you finding Pinterest links?

Google, I google anything and they show up (ESPECIALLY IMAGES). Blacklist one domain in search? Don't worry they've got 200 other ones.

I ended up doing a wildcard blacklist with uBlacklist

?? That just means you haven't clicked on the links. Of course the pollution will not be represented in your browser history.

Nobody is saying they are forced to visit the site.

Are you using Google Images? Because thats the main culprit.

I am not, that might explain it.

Not sure exactly why/when the switch over happened but Bing has dominated Google for image and video search for years.

They've infested Google's image search for years.