A number of sites are purposefully mislabelled to generate traffic to those web pages, but there is nothing preventing a user from clicking the BACK button of her or his browser. Every modern browser has one. There is simply no need to wait for objectionable images to fully load in the browser. Worse comes to worse, you can always close down your browser and start anew. It's not a bad time to remember our values.
Values are vital allies in any trying situation.
I believe not. By emphasizing values over filters, we're implicitly expressing a trust in our children that they will decide wisely when the opportunity presents itself. But, that is for children of an age to understand right from wrong. Well, if you're a teacher or a parent, you are exercising extreme irresponsibility by allowing your student or child to go online unattended. Parents and guardians are solely responsible for their children, not the filter makers, not any third party.