They should and will get fined for it and both the person who entered the pitch above (who looks like an absolute mug) and the person who threw the coin will rightfully be banned but.....In my opinion the situation could have been avoided by Rio not celebrating in front of the City fans, he is an experienced player and should know better. It was also something i bought up about Hernandez in the who Clattenburg game vs Chelsea. He celebrated right infront of the Chelsea fans gestering his "C" celebration to the Chelsea crowed and a steward got hurt and was taken to hospital. Now before i get it from all angles i am not condoning the actions from the fans in both incidents but players can help the situation.
Weren't the Man Utd fans behind the goal that RVP scored at? So the players weren't trying to celebrate in front of Man City fans but celebrating in front of their own fans.