Righthaven founder Steve Gibson is going after copyright infringers using the murky legal definition of fair use to power a sue-first strategy. Yet with sharing tools booming online, could clicking a Like button lead to a lawsuit? Every year billions in wagers are laid down in the gambling halls of Las Vegas. Last spring, however, one local company, Righthaven LLC, started a new game by betting on the unlikeliest of entities in the local courts — print media. By aggressively suing alleged copyright infringers, Righthaven has taken the shooter position in an consequential game of craps that is sure to...