What some employees haven't quite learned yet is how to read between the lines. They are certain topics which are ok to protest and be vocal about, but others, are not, like unions or this case. To be safe, it's better to think of "bring your whole self to work" as a gullibility trap. It may not be that, but effectively it will function as such. It catches the naive troublemakers so later on they can be filtered out.
I suspect, though, that in most companies the employees already know what would happen, and would not do things like that - first, because they don't feel entitled using the company's resources for personal goals, and second - because the consequences may be too heavy for them. But in Google, one probably can be both rich enough already to be fired and not sweat about it too much, and entitled enough to feel like something like this is the right thing to do.
Those who are educated are more able to clearly understand the consequences of their actions or inactions and understand lack of solidarity for others means lack of solidarity for yourself.
The purpose of liberal education is to teach people how to critically think and build a world that they themselves would like to live in, so when a liberally educated ambitious person realizes that they are contributing to building a lesser world it becomes problematic and they correctly feel a need to take responsibility for building a better future.
Add in a legacy of declaring that "don't be evil" is a founding principle and you are going to find people being pretty upset about being lured in with promises of social responsibility and like-minded peers, only to find an ethically devoid pursuit of next quarters profit that can be found at nearly any company in America.
In this example we have one person, that might be telling.
So while it might be a problem, I'm not sure how widespread it is.
He could have left quietly, but he decided to take a personal hit to bring awareness to the issue. That makes him a hero in my eyes.
I would speculate it has something to do with what age range they like to hire or their branding. But I'm not sure.
At my previous company, at an offsite retreat, one of the guys got drunk and started chewing out the company's founders and the main office manager. Sure enough, he was fired by the time the retreat was over, and was never seen in the office again. A similar thing happened to someone who had a huge blowout argument and emailed the entire company his manifesto (of sorts).