There's a huge flaw in there. When I rent a unit, I will do some client research and to the extent I can I will block the rental based upon my findings. For example if I read their blog and they come across as a risky customer (a profile photo with machine guns, money, and drugs or postings showing a they have a lack of character). Now it could be they also happen to be black, but when they create a fake profile and then get accepted it does not mean I blocked them due to race.
At a minimum you would need to make sure you fake both profiles to ensure everything but skin color is the same.
At a minimum you would need to make sure you fake both profiles to ensure everything but skin color is the same.