We have a pretty good system set up for filtering adult content; however, some people are still finding their way through our filter and into the seedy side of the internet. I believe they are doing this through image searches and thumbnails.
I would like to filter explicit image search results for our entire network. Our laptops especially (we're a public library; those that browse adult content tend to favor using the laptops). I had planned on just manually doing this inside of Chrome but noticed that the Safesearch lock is user account dependent. I'd like to keep that locked down even if someone logs into it with their gmail address. Is there a way to do this? Or maybe a better way to do it network-wide? We have a Fortigate firewall/filter in place.