To recap,
Bennett dives at the center's legs at the snap of the ball, then wrestles him down 5 yards downfield. Starts a brouhaha. Gets a 15 yard penalty.
Richardson gets involved in the fracas, pulls one guy down, throws a wild punch that doesn't land, gets a 15 yard penalty and is ejected.
The next play, Jefferson gets into a fight as well, and is ejected. This leads to the confrontation with the fans, and Jefferson attempting to climb into the stands.
The NFL took a dim view of this and issued a statement detailing the consequences of messing with the officials.
Oh, and no suspensions.