A black man is looking for a furnished place, and adds the following to the end of his Kijiji ad:
There is one catch I am a black male.
It suggests that he has previously called about apartments and received a positive response, until he showed up in person to look at it. At that point, the landlord saw that he is black and was no longer wanting to rent to him.
So he now gives a heads up in his ad so that his time isn't wasted, and so he can avoid another experience of racism.
And some people believe that the world is more civilized than it used to be...
See also if this is an issue for anyone.