I'm on Twitter, I'm on Hacker News, I'm on Reddit, I'm on Gitter, I send/receive dirty jokes on WhatsApp, etc. Plenty of opportunity to waste time, no need for FB to be in the picture at all. I've been composing this stupid message for the past 5 minutes.
But I'm using Facebook less and less. For me the "open web" is a necessity, not a moral high ground or anything like that. I don't like opening Facebook blog posts because Facebook sucks for blog posts. TFA mentions the Internet Archive or Google not indexing articles. Hell yeah, those are really good concerns.
Also, forget the open web ... how about the fact that if you give them permissions to access your photos, on iOS at least, they are uploading your photos to their services for making photo collages, without you explicitly allowing this.
I know this because I opened the app a week ago and I was proposed a collage with animated transitions and music in the background, titled "Your Sunday evening in Bucharest", that couldn't have been processed on my phone - especially since iOS restricts background activity, plus it would be pretty bad for battery life.
And I freaked out, so now Facebook is gone from my phone. Article mentions an all out assault on the open web. Sure, but it's also an all out assault on people's privacy.
I was 7 when Ceaușescu was shot and communism fell in 1989 and before that paranoia was at an all times high. People were afraid for example that their phones were tapped and that their neighbours were listening. Which was in fact true, but oh boy, that's nothing compared with what happens today.