Facebook filed one suit and faced another last week. A...

profit. Facebook places ads on teenagers’ pages that can be tagged with “Like,” making their friends more likely to click on the ad, said Los Angeles attorney John Torjesen. It’s using a teen’s information to commercially endorse a product without first obtaining parental consent, said attorney Anthony Stuart: “We believe it is a clear case of exploitation of children for the sake of profits.” The suit is without merit and will be opposed vigorously, said Facebook spokesman Andrew Noyes. In another case, Facebook on Wednesday sued the makers of Teachbook, a social networking site for teachers, in federal court, alleging copyright infringement. Facebook is a well-known brand name with the word “book” in its title, said Noyes, and users could confuse the two companies. “The Teachbook folks are free to create a similar service for teachers or whomever they like, and we wish them well in that endeavor,” Noyes said. “What they are not free to do is trade on our name, create confusion, or dilute our brand while doing so.” The suit is like “bombing mosquitoes,” said Teachbook managing partner Greg Shrader. Teachbook is a two-person operation that hasn’t even launched yet, Shrader said: “They will try to bully us around. They expect us to roll over. We're not inclined to do that.”