AmiMoJo writes: Another company is learning about the fine points of Section 333 of the Communications Act, which prohibits willful interference with any licensed or authorized radio communications. This time, M.C. Dean, who provided the Baltimore Convention Center's in-house WiFi service, were caught by the FCC sending deauthentication frames to prevent hotspot users maintaining a connection. The complainant alleged that M.C. Dean's actions were identical to those that had earned Marriott a $600,000 fine only weeks earlier.