SomeOne points to This Editorial from The Mercury News that says the problem with filters is they often can\'t tell the difference.
They add An ill-conceived law forcing libraries and schools to use filters or risk losing federal funding has already run afoul of the First Amendment. They say Communities have a duty to take a closer look at how they are being used. Failing to do so is tantamount to handing censorship privileges to the whims of a bureaucracy -- and of the filter makers -- while doing little to make children\'s Internet surfing more secure.
\"IT\'S no secret that trying to sanitize the Internet with a porn filter is a bit like trying to whack weeds with a lawn mower: you\'re bound to cut a lot more than weeds, and the blades will inevitably leave some weeds intact.\"