At that level of competition, you are opening yourself to accusations and testing. It is part of the IAAF policy to test if anything is suspected. And for good reason.
I feel bad if they find out they are something they did not expect, however, they did not have to compete if they feared the results. If you take steroids and enter Major League Baseball, and suddenly are hitting lots of grand slams, you WILL be checked, it's just how things are. In car racing they have the right to tear the car apart. All of this is well laid out for you in advance at this sort of competition.
Black, white, male, female, it doesn't matter. If you wipe the competition, expect it and don't complain. It's part of the rules you agreed to.