Pretty silly thing to do whether or not you have perfect examples, and strange to follow that up with the fact that you've been offering career advice..
There's not a lot of benefit to making a public discussion out of something like that compared to the pretty personal ramifications to the person brought up, which makes even the most constructive attempts look vindictive.
I also noticed the bit about offering career advice to people in Google, but I found it odd for a different reason. How can someone who's spent 18 years of their career (and I'm guessing, almost all of it) at Google possibly be qualified to give career advice? They can give excellent advice for working at Google. But if they haven't left the company in 18 years, then surely they don't have the experience to give useful career advice that isn't at least heavily biased toward the idiosyncrasies of their one job. Even if they had a decade of experience prior to Google, how useful is pre-2005 career advice now?
That's not to say the author couldn't give valuable advice, especially in more generalized areas like the craft of programming, or even navigating office politics. It's just that any advice will inevitably be specific to Google. It seems strange to offer career advice when you've not had a "career" per se - more like you've had one really long job.
And who's asking him for this advice? Did people get wind that he might be looking for other jobs, and so he became the "career guy?" If so, that's a revealing insight into the culture at Google, evocative of flock animals asking their least risk averse member what he saw on his adventure beyond the paddock...
There's very little to be gained by making a post like that focus on an individual. I do think there are often changes in companies over time as they age and grow--but it really isn't so much about some specific individual much of the time. To some degree, it's inevitable.
There's not a lot of benefit to making a public discussion out of something like that compared to the pretty personal ramifications to the person brought up, which makes even the most constructive attempts look vindictive.