No doubt that final was packed to the gills with dopers or former dopers, but some people seem to think this means Gatlin doesn't deserve to be booed.
He absolutely does, the crowd knows he's been banned TWICE for being caught, that he's never owned up to it, and that despite being in his mid 30s he came back from the ban running faster than he was before it. So we basically know he's still cheating, or at best is getting residual benefit from previous cheating.
His best pre-ban time was 9.85, he's run faster than that 14 times after coming back from not competing for 4 years and being an old man in sprinting terms.
Yes Blake probably deserved to be booed as well, but the reality is a good chunk of the crowd are probably unaware of his suspension.