You can find the quote on New World Notes here. I can understand why Karl said it as anyone who deals with the public has to cope with insane customers now and then. If you combine that with the "celebrity" status Lindens have I imagine it can get tedious.
I personally take my Wackadoodle status to heart! I am guilty of spending way too much time in Second Life over the years and I am guilty of caring a hell of a lot about the future of SL and virtual worlds generally. From time to time I am angry with Linden Lab and I say so right here on the Internet. Its true. All of it.
So I decided to wear my Wackadoodle title proudly. If you want your very own title message me. I will add you to my personal group which I created to manage land way back in 2007 but which exists now only so I can create titles that amuse me. Like Wackadoodle.