Re: re: Protect
It's a good idea simply so that a child won't accidentally see something they shouldn't. They could very easily bypass this or go in search of something inappropriate, but this is not designed to prevent that.
It has the same efficacy as something like the 9pm watershed: before 9pm television should be relatively safe for a child. Of course, a child could intentionally stay up, or go round to his mate's house and watch something naughty, but nobody pretends the watershed stops that.
I think it's a good idea. Make it a generally safer environment, but without trying to regulate the internet by removing or banning obscene content. Keep the filth, just hide it unless you look for it.
Much like Google's SafeSearch. I am happy to have it off all the time, but if a 5 year old was using the computer, you'd probably want it on. You don't expect it to stop anyone determined from finding something or disabling it, it's just so that they don't accidentally see something and click out of curiosity.