The athletes are not politicians. They do not have to speak to the press. If the athletes are presenting themselves upon the expectation that certain rules be followed, then those rules should be followed. It is no different than expecting Asafa to not be taking 50 supplements and Tyson Gay not obtaining illegal treatments (DHEA is what I've heard) from an anti-aging doctor, and other idiotic things.
That's why we have these problems: People try to violate the rules.
And BTW, it should be pointed out that SAFP has tested positive (but for a painkiller) while Jeter has not, and it was SAFP, not Jeter, that the question was addressed to, probably because she has the same club and coach as Asafa.