I think that is an aspect of the problem outlined in the article.
It's easy enough to keep the discourse at work fairly light when it comes to political issues. But in a world where everyone follows each other on social media it becomes harder to separate. So you find out that the nice pleasant guy you sit next to at lunch has "liked" a ton of neo-nazi groups.
Why would anyone follow their coworkers? I follow people whose opinions I want, and I 'friend' my friends - a few coworkers included, but not 95% of people that I meet in the office daily.
I hold roughly the same opinion and generally try to avoid social networks. But I've certainly worked in places where everyone followed everyone else and it would probably be seen as rude not to.