No kidding! You used to be able to personalize your Google search results to blacklist pinterest.com but they removed that feature a while back. Now you have to type out -site:pinterest.com every single time you want to search for something or install an add-on like:

https://addons.mozilla.org/en-US/firefox/addon/personal-bloc...

It's seriously annoying that they had a feature that solved the problem then they took it away. Just like removing the "View Image" button.