Debating on if I want to do anything similar on here. The problem is, which most people don't take into account, is that "friends" here on LJ serve two purposes... inclusion into your own "friends" page for reading, but also inclusion into your friends list for security purposes (i.e. them being able to read your friends-only posts). So even if you don't want to read someone else's LJ, they have to be on your friends list if you want them to be able to read yours. Of course, that's where friends groups, Default View, and filtering come in, but eh. There's really no real way to "clean" a friends list on here... even if you delete people, the fact that they still have you added clutters up your list anyway so what's the point in deleting them... unless you specifically want to exclude them from reading your protected entries, why not just exclude them from your Default View group and ignore it otherwise? Which is the only good solution I think... it's too much hassle to deal with otherwise.
I guess I'll do that now... my default view group needs work.