nature will take its own course... you can either wait for CC to fall apart with all your curses or step up to take action.

This is all pin-pointing on probably a particular individual or particular instance which made them take this decision.

than making this a racist issue , just avoid CC on a friday or if you happen to be a victim of such a comment, you could return any other day and make sure you take up the issue with higher authority, probably with a taped evidence, i am sure you will be heard and will definitely have the guard removed from his post..