Various buildings overlook Wrigley Field, home of the Chicago Cubs. Entities unrelated to the Cubs operate businesses on those buidlings’ rooftops, charging admission and selling food and drink during Cubs games. The Cubs have sued some of these businesses for, among other things, falsely suggesting endorsement by the Cubs:
Chicago National League Ball Club. LLC v. Wrigley Rooftops II, LLC, et. al., 08 c 968 (ND Illinois Feb 15 2008).
The Cubs are also considering putting up screens to block the view.