The Danger of Filters
Wednesday, April 27th, 2005 by Eric MaSo exactly how good is Internet filtering technology? Even if strict scrutiny isn’t applied to the Children’s Internet Protection Act (CIPA), the government still needs the filtering requirement to be substantially related to its goal of protecting children from obscenity on the Internet. The American Library Association provides a list of eight of the most commonly adopted filtering technologies used in libraries, with a brief description.
Questions remain, though, about the actual quality of the filters, and how much they “underblock” and how much they “overblock”. Dan introduced some alarming anecdotal evidence on the problems created by bad filters. One item we didn’t address much that is of significant concern for many is the power filtering technology companies have in light of legislation like the CIPA. Are we sure it makes sense to allow someone the power to restrict the information we can receive from the Internet? How can we be sure software providers don’t have an alternate agenda, and seek to block things beyond obscene pornography?
It’s not just a wild hypothetical – it’s happened repeatedly. While it is true that keyword blocking has accidentally blocked sites discussing “chicken breasts” and unsophisticated object blocking has blocked art instead of pornography, a much more threatening type of filtering also exists. Virtually all filtering software has a pre-included list of URLs that are to be blocked, and what URLs have shown up here in the last decade might surprise you. CyberSitter (an award-winning software, no less) once blocked TIME Magazine’s website due to an article that criticized CyberSitter as a product. Other blocked sites have included the ‘National Organization for Women’, anti-racist websites, gay politics websites, and more. The power to control information is not something to be taken lightly, and the abuse of this power is a real, if not widespread problem that we ought to consider with regards to filtering.
A skeptic might say, “but filtering software that made such choices (or accidentally overblocked) couldn’t do so over the long term – word would get out about what sites were being blocked, and they would quickly be added to the safe URL list. The ability to add sites to the safe list means filtering software essentially rapidly improves.” I was hoping this was the case – I’m now not so sure it is. In 2001, Ben Edelman, a Harvard researcher, published a list of sites inappropriately blocked by popular software. Despite publishing his findings and sending this list to the software companies, five months later, most of those sites were still blocked. You can read about it here (scroll about one-third of the way down).
Of course, this evidence is anecdotal, and one can argue that this evidence doesn’t illustrate that severe a problem. Nonetheless, it’s irrefutable that bad things have happened before (far worse than not being able to access the web page of Middlesex) and it would be naïve to think it could never happen again. That’s why if you support filtering software, I think it only makes sense for the CIPA to mandate that any adult request the filter be turned off. How often do you even look over people’s shoulders at the library to see what’s on their monitor anyway? Free flow of information is extremely important to protect, and given the problems presented by filtering software, it makes sense to allow adults to turn off the filter at any time.