There is a disable button on the web interface[1] which allows you to either disable it permanently, or for a specific amount of time. Of course, client devices need to clear their DNS cache, too, in order for this to work properly, but at the moment there is no way of automating that.
There are also other tools to help with blacklisted domains that cause issues/site breakages, such as a query log to identify them, and the ability to whitelist with ease!
There are also other tools to help with blacklisted domains that cause issues/site breakages, such as a query log to identify them, and the ability to whitelist with ease!
[1] http://imgur.com/a/DlIeq