API v2 introduces a new feature that will allow you to block entire search terms and specific icons by their id. Once you begin adding to this list, you can turn it on and off easily on your icon search results by using the “?blacklist=1” query string.
This feature will allow you to build your own safe search. Free accounts are limited to a list of 10 total items. Paid users can add up to 40,000 items in total to their list. You can read more about it in our documentation https://api.thenounproject.com/documentation.html#blacklist