He'd been on Adderall for ADD since he was a kid. He was suspended where others have been given warnings. Yeah, he should have been smarter than to get caught with something after that, because he was already on thin ice (whether or not that thin ice was of his own making), but the four year ban was appropriate given the circumstances surrounding the first suspension. Four years in sprinting is still a damn long time.

I do think that the Brits should watch where they are pointing fingers, given that their hero Mo Farah trains with Alberto Salazar's group...

As you say, the clean-cut Brits are not novices to the doping game.

... group are dirty. Somewhat more broadly, the way Nike plays the 900 lbs gorilla in T&F, bullying athletes and coaches, turns me off the entire company. I won't wear Nike shoes.