I really hope so, because the ref will be busy controlling the game, I doubt they do hear the crowd all the time. But in any case, that's a great move. Hoping they'll do some action to your campaign in your signature as well.
:D Smart thinking (for Erik's idea)
About giving a penalty, who would take the decision? Will the ref stop the game and say, hey...they are chanting rascist chants now, I'll give a penalty?