I think CD is talking more about Facebook than twitter.
And I don't have many problems with Facebook. It's a great way to keep extended family and distant friends up to date about my kids, and what we're up to as a family. And for me to follow their activities, likewise.
If people post annoying political crap I just ignore it. From my observation, people who get upset about Facebook posts, are looking for a fight anyway. I have no interest in that so it's easy to ignore.
I'd say that I think twitter is worse, except I don't see enough twitter even to know, really. Certainly anytime someone tries to cite a twitter quote as a news source, I 100% ignore it. But I don't get on twitter deliberately anyway, so really the only time I see it is when someone on Facebook, or a message board, quotes it.