I figure the best strategy (again, as a non-parent) is kind of defense-in-depth: implement some general screening to keep the ambient level of attention-bombardment somewhere sane, help your kids develop sane habits around their tech use and getting what they want out of it, and educate the kids on why those controls are in place for the stuff that leaks through.

Again, my main concern is how much people crutch off of "just block everything," along with the knock-on effects that can lead to. E.g., there's a growing pile of people in the US who class any form of LGBT media as "pornography", which is patently ridiculous, but if that's the criteria used by your chosen filter mechanism or if that's the criteria people try to apply to society....