
First of all, Begala's claim doesn't make sense. Limbaugh apparently was successfully treated for his addiction, so barring evidence of a relapse, he's not drug-addled. Indeed, the fact that he lives in sober clarity ought to be disquieting enough. His ravings would be less disturbing, not more, if they were simply the product of a drug-addled mind.
More importantly, no one volunteers to be an addict, and it's not fair to attack Limbaugh for his addiction. In fact, it sets a disturbing precedent, because Limbaugh did what you're supposed to do. He admitted he had a problem and got help, and he did so before his addiction got someone killed. But now his addiction -- and recovery, because we very likely wouldn't know about his addiction unless he had sought treatment -- is just so much political ammunition.
The message to struggling addicts is chilling: If you admit your problem and seek help, you'll regret it.