I don't particularly like Farah and have my doubts about him, as do many other UK enthusiasts of Track that I talk to. But there is a BIG difference between Gatlin an the 2 examples you give; neither Farah nor Ohurogo have failed a drug test, whereas Gatlin has !.....twice. I am aware of the circumstances of his first test, yes, but all the more reason to not then make the choice to use other drugs after. Obviously that deterrent didn't work with him!
UK fans are consistently harsh towards proven dopers. Linford Christie became a pariah after he tested positive post career and wasn't allowed to be at track side at meets when coaching, and Chambers was often booed by home crowds post his suspension.
Irrespective of whether Farah or the big O doped, there is no proof that they did. A crowd, however knowledgeable, aren't mind readers and can hardly go around booing anyone that they 'feel' might be doping, can they?
But of course posters on here, who pretend to be knowledgeable, can metaphorically boo any athlete they don't like or feel must be doping, even without a positive test. The hypocrisy is mind-blowing.
Yes, that's exactly the point I was succinctly making. I don't think Gatlin is doping now, but that isn't why I don't like him. He has cheated in the past, never apologised for it, never admitted to it, and was allowed (no, that's not his fault, I realise) to return with the long term benefits of steroids in his system, enabling him to deny others (many clean athletes) from possible medals, glory, financial rewards, etc.
He would certainly be at the top of the IAAF testing pool, and it was that testing system that caught out Powell and Blake, amongst other Jamaican runners. And no, I don't support Blake or Powell either.
Access to Jamaicans for the IAAF to test them, prior to the Jamaican national testing procedures being forced to become more rigid, is certainly more successful than those Kenyans and Ethiopians who disappear into the mountains for months on end.