"I fear that we are approaching a tipping point, where the volume of garbage soars beyond and overwhelms the valuable of what is on the web," Blekko founder Rich Skrenta .

Skrenta fears that the Web is headed the way of e-mail. It's estimated that 90 percent of e-mail traffic on the Internet is spam. Imagine what surfing the Web would be like if 90 percent of all Web pages were spam racks for advertising.

"What happened to e-mail was the result of very powerful economics," Skrenta explains. "Spammers and con artists discovered they could reach a massive audience for pennies. And this scale of audience essentially guaranteed a very small but profitable return. Today the economic incentives for web spammers are even more lucrative than email spam and almost guarantee a continued blizzard of trash on the Web."

Just as email spammers hire , Web spammers are enlisting low-wage workers to churn out Web pages at anywhere from five cents to a dollar a pop.

"Web spammers simply have to create pages on the Web and sit back and let search engines send them money," Skrenta writes. "Current search engines have abandoned any attempt to enforce even the slightest modicum of quality control. Revenue is guaranteed if a page can draw a click."