Real fans shouldn’t suffer due to a handful of racist idiots. What is something non-violent that a body of fans can do or chant to shut down someone in the crowd near them being racist and show support for the players targeted?

It would be great to launch an awareness campaign for a coordinated action all the other fans can take which drowns out the racism in football, showing solidarity and support for the player(s) being targeted, and belittling the behaviour of problem fans. What are your suggestions?