Dude, I've been reading Joel since 2002, and every time he goes on to blog about hacking he looks silly. His posts about "harm of exceptions" (he prefers -1 as a return code), about "mistake of .NET" and, from relatively recent ones, about poor Ruby performance do not make him look good as a hacker in my opinion.
Besides, he never really was a programmer. If I remember correctly he started his career as a program manager at Microsoft.
He's great as a general technology trends observer and I find his thoughts on business side of software crafting immensely useful, bug a hacker? No.