Make a Change:
Dance
This can be done along with the flash mob or you can look at doing this with a smaller group. As this is a Physical education/dance standard it is more about the physicality of the dance and how it relates to a ethnic group or social group.
It can be a dance others have done before that you are copying like the Haka done at the start of a rugby game or a ballroom flamenco dance.
When I think of dance used for a social action I think of Capoeira and the gumboot dance that the South African mineworkers would do after work. They danced in defiance of the conditions they lived under and against the people who dared to make them less. Capoeira was to hide that slaves were training to fight. It even helped some to overcome their owners and take back some of the islands that were held by savage rulers.
You should create a dance using a specific ethnic style of dancing that will highlight your issue the best. You need to finalise the choreography and practise the dance. Your movements will need to be precise and on point. Perform this dance to an audience or for a camera. I would love to see this go out to the world so do your best.