Which is a shame, but not so much of a shame that I feel any problem not following the individual any more. They had an interesting perspective on a variety of things, not just the topic area (I assume) was the cause of the shunning, but c'est la Internet, as the French say.
(Ironically, I discovered this in trying to respond to a post they made asking a question about a completely separate topic. And I had the answer for them, too. Go figure.)
2. On the other hand, I've decided I feel no compunction about all-out blocking people who post chain mail to G+. Including that godawful "A boy and a girl are talking" meme thing that ends, inevitably, with "send this to a bunch of other people and something awesome will happen to you."
Okay, yeah, I believe in supernatural stuff, but Internet chain letters aren't part of my delusion. Get out of the meme pool, please.

Now you made me paranoid enough to go check and make sure I didn't have you muted somehow. 😀
I recently told someone to bugger off just because of his pure egotistical negativism. I didn’t block him (though that option remains open) but I did let him have it, as with maybe five other people in the last dozen years.
One guy a few years ago followed one of my links to a woman’s blog about her autistic son, and mocked her and her son. I blocked his name, and his IP address. After I told him to never darken my digital doorstep again.
+Curt Thompson No, 'tweren't you. 🙂
I had a similar experience recently and found it oddly liberating. It was a site of (frequent) contention on which I no longer felt obligated to engage. I'll be putting that emotional energy into something much more satisfying.