I think there is a possible problem with K9 and HTTPS addresses, when i have a category blocked it blocks all the sites using HTTP (port 80) addresses but HTTPS (port 443) addresses are mostly allowed through! This has resulted in inappropriate content being accessed using the HTTPS protocol!
A simple test using google as an example:
Block access to the "Search Engines/Portals" category.
Browse to http://adwords.google.co.uk/
You will see this is blocked (as a search engine)
Browse to https://adwords.google.co.uk/
The same site but now NOT BLOCKED!
Please help in addressing the issue,
Kids Get Help
A workaround is to put a block on the keyword "HTTPS" this prevents the issue.