My kids are heading towards this age and I feel this area is very complex.
I don't want my kids to be afraid to surf anywhere, but by the same token, I want to know where they are going, but then again I can imagine that there are things they might want to research that they don't want me to know about. So my regime at the moment is... everything will be logged through the access proxy installed at our home. Except for periods of time where they can go and look at anything they want, but during these times, they must be supervised by an adult that we trust, of which we know enough that are sufficiently broad minded that I know there is nothing they couldn't go surfing for if they wanted to.
In particular I am thinking sites about sexuality, drugs, medical issues or other controversial topics that theor parents could never understand.... :-)
If this goes well, they will be allowed to surf unsupervised and unlogged as they get older.
Some problems do not require technical solutions, or rather do not require gatekeepers but perhaps better chaperones.