I think that because of other social sites like twitter, when someone unfollows you, you just instinctively want to know who. I too was wondering this briefly because I know of individuals on twitter who follow people just to get them to follow back. Then, they randomly unfollow people hoping those unfollowed won't notice. This habit allows them to have a higher followed number than following number. Here, though, your only noted by how many people follow you.
Whew, so... with that said. I guess us fellow wanderers will just have to change our way of thinking when it comes to the following thing here on hubpages. And doesn't a change of thought matter more than the person who stopped reading your hubs?