In the modern world, it seems like de-friending people on Facebook, Twitter, or whatever is really common. People will agonize over why so and so dropped them as a friend. Did I do something wrong? Were the ten billion photos of my newborn child one too many?
I'm on Facebook, but I've never dropped anyone as a friend. Partially because I don't know how. But also, I'm pretty sure that on any social media site, I can block things I don't want to read. In all honesty, there were a few people on my friends list who went a little overboard with the babies updates and I just couldn't take it anymore and so removed them from my feed. It was easy and they never knew!
I say we end this random "defriending" of people. It's fine if you defriend someone who's a stalker or doing something really reprehensible, but if you have to think about it, I say don't defriend. Why hurt someone's feelings?