What are the rules when a site publishes false information about you?

If an Internet company publishes false information about you online, can you sue for damages even if you weren't demonstrably harmed?That, essentially, is the question that hangs in the balance Monday as the U.S. Supreme Court hears arguments in a case that pits online data broker Spokeo against a Virginia man.Google, Yahoo, Facebook and eBay have all weighed in with support for Spokeo and are watching closely. There's good reason: Which way the court decides could have significant implications