How does social stuff work on Goodreads? I scroll through your bookshelves when I'm bored, but that's about it. Also, every single book I've ever searched for there has been marked "to-read" by Mumei. Should we make a list? Lists are fun.
I don't actually intend to read them; I just already know what books you're going to add and add them first.
And I don't know how it really works. I just look at the feed and add anything that looks interesting that other people are reading, and I occasionally like or comment if someone is reading something I've read. And I sometimes read reviews, but not that often.