From comments made in various threads in the Community re. the Web Threat Shield and the associated URL Reputation Service, of which the following is a very recent example:
It has struck me that a useful feature to help the Threat Researchers at Webroot & Brightcloud, would be the capturing & transmission of information back to base, of when the user locally uses the 'Unblock' option to advance past the blocking webpage thrown up by the Web Threat Shield.
Whilst I am not suggesting that this is input directly into the URL reputation determination process, it may be worth considering whether the collection of such statistics would help Brightcloud spot sites that need to be investigated more closely because of a large number of local overrides...not only sites that are potentially popular or becoming so but which might also indicate that there is an issue with reputation, etc.
Just an idle tbought that may be of use going forward.