CLEVELAND—Coach Eric Mangini issued a stern warning to the Browns Monday, dissuading players from using Twitter or other social networking sites to identify any person or persons they plan to murder. "What you do on your free time is your own business, but you represent this organization and you need to think before saying something stupid that ends up all over the Internet," Mangini was overheard telling his players following their morning workout. "Now, nobody is saying that you can't have Twitter accounts or that you can't kill people, but keep it between you, your family, and the person you are killing. The last thing you want to do is create bulletin-board material for the police." Mangini also asked players to stop repeatedly posting "The Browns suck!" on Facebook.