In principal I agree that Doctors need to be held to a higher standard than Joe average citizen when it comes to drug use, as they are entrusted with making life and death decisions for others.
That said, we don't know much about PoorMD other than that he did a line of coke recently. That might not be the smartest move--for a lot of reasons--but I hardly think that qualifies, in and of itself, as "abuse". And I have known quite a few people in my life who used drugs--legal or otherwise--on a more than "I tried it once in college" basis and yet still remain functional, decent people. The idea that any use of any illegal drug qualifies as "abuse" is one of the pillars of the horses**t arguments the government has rammed down the throats of the American people for the last several decades in its attempt to convince us that its paternalistic, obtrusive, "war on drugs" is justified.
Lastly, I would just ask how many of us haven't, at some point in our lives, done something stupid that could have blown up in our face and cost us a medical career? I'm not condoning PoorMD's behavior or making any statements about his particular situation, because I don't know him. I'm just saying that in principal I believe in second (and somtimes third and fourth) chances.