The central question in the death of American extremist cleric Anwar al-Awlaki is not his innocence. That really misses the point. Awlaki was the only publicly known name on a covert list of American citizens the US government believes it can legally kill without charge or trial. Awlaki's killing can't be viewed as a one-off situation; what we're talking about is the establishment of a precedent by which a US president can secretly order the death of an American citizen unchecked by any outside process. Rules that get established on the basis that they only apply to the "bad guys" tend to be ripe for abuse, particularly when they're secret.