Web ad blocking may not be (entirely) legal

As Web browser add-ons that let people erase ads proliferate, legal experts to wonder when the first lawsuit will be filed.

Advertising-supported companies have long turned to the courts to squelch products that let consumers block or skip ads: it happened in the famous lawsuit against the VCR in 1979 and again with ReplayTV in 2001.

Tomorrow's legal fight may be over Web browser add-ons that let people avoid advertisements. These add-ons are growing in functionality and popularity, which has led legal experts surveyed this week by CNET News.com to speculate about when the first lawsuit will be filed.

If ad-blockers become so common that they slice away at publishers' revenues, "I absolutely would expect to see litigation in this area," said John Palfrey, executive director of Harvard Law School's Berkman Center for Internet and Society.


The Interactive Advertising Bureau, the lobbying arm for the online ad industry, says it isn't preparing a legal offensive at this point. Mike Zaneis, the organization's vice president of public policy, said he wants to work with software developers and consumers to come up with a middle ground on what he describes as an "issue that is just now ripening."

"We don't want to go down a route that would seem adversarial at all," Zaneis said. "People are free to ignore ads, and they often do that, but when you have a third party blocking those ads, that's the real problem." He said the IAB is "looking at all the options."

Ad-blocking tools have been around for years, of course, albeit not without controversy. Nearly a decade ago, a Web software firm called ClearWay Technologies released a beta version of its AdScreen blocking software to threats of boycott from Macintosh-oriented publishers that feared the product would kill their ad-supported Web sites. The company responded by killing the project. Before that, security firm PGP Corp. discontinued an ad-blocking program called Internet Fast Forward because its creator said he had been threatened with copyright lawsuits for modifying publishers' pages without their permission.

Ad-blocking recently hit the spotlight again when an obscure blogger named Danny Carlton--who expounds fringe political views such as AIDS being a "mythical disease" invented by the U.S. government--banned Firefox users from his Web site. Claiming that Firefox creator Mozilla Corp. has endorsed the Adblock plug-in, Carlton redirected Firefox browsers to Whyfirefoxisblocked.com.

The New York Timeswrote about the Whyfirefoxisblocked.com kerfuffle last week, and the CNET Blog Network expanded on the topic from a technical perspective. On Wednesday, Carlton lifted the ban on all Firefox users, saying he found a way to identify only Firefox browsers outfitted with Adblock Plus.

MySpace, LiveJournal: Don't block our ads
Many Web sites prohibit any kind of ad-blocking in their terms of service agreements. MySpace.com prohibits "covering or obscuring the banner advertisements on your personal profile page, or any MySpace.com page via HTML/CSS or any other means." Six Apart's LiveJournal uses similar language, as do some news organizations including the Chicago Sun-Times and Fox TV's Houston affiliate. CNET News.com does not.

Any lawsuit would likely invoke two arguments--that copyright infringements are taking place (through derivative works), and that the Web site's terms of service agreement is being violated.

"From a pure legal point of view, a Web site can do anything it wants, so to speak," said Michael Krieger, an intellectual property and business lawyer with the firm Willenken Wilson Loh & Lieb in Los Angeles. "That's a little overstating it, obviously, but suppose to get into Google, you first have to click 'I agree, I'm not blocking ads.' I think it's perfectly within their rights to do that."

In the past, entertainment companies have threatened commercial-skipping products on the grounds that they violate copyrights. ReplayTV, which sells digital video recorders, eventually dropped in 2003 a feature called Automatic Commercial Advance after facing a lawsuit from major TV networks and movie studios over that and other issues. (A judge dismissed the suit the following year.)

It's not clear whose side the courts would take, if asked. In the famous lawsuit over the VCR from nearly 30 years ago, the movie studios claimed that Betamax users would fast-forward through commercials.

They lost, of course. The 1979 district court opinion estimated that only 25 percent of VCR owners fast-forward through commercials. But it was based on the technology available at the time: what if it was easier and 95 percent of TV viewers did it? (The judge said: "To avoid commercials during playback, the viewer must fast-forward and, for the most part, guess as to when the commercial has passed. For most recordings, either practice may be too tedious.")

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