World Wide Web die-hard surfers -- many of whom tend to be privacy-rights absolutists -- have been horrified to learn that thesoftware that guides them through the Internetcould pose huge Orwellian problems. Over the last week or so, a growing number of heads-up E-mail dispatches have warned that some "browsers," including free and commercial copycats of the popular Mosaic program, quietly supply the Internet E-mail addresses of Net site visitors. These lists, critics argue, could soon be sold to the highest bidder --or even to government snoopers. "You'll go into a bulletin board that has an ad, and in a little bit of time, the manufacturer can start sending you junk mail," David Farber, a University of Pennsylvania computer science professor, told TIME Daily. The next step, Farber and others theorize, is a credit-card-like record of what you've bought over the Net and which political discussion groups you've perused. Web programmers, who never intended such consequences, are now talking about creating either "privacy buttons" or warning labels.Post your opinion on theNew Mediabulletin board.