I'm not at all a fan of "walls". I like any communications between me and someone else to remain between me and just that someone else. I like something that has my name on it to have only stuff that I've posted on it. The way I see it, if someone has something worth saying to me he can say it in an e.mail. If whatever it is isn't worthy of an e.mail then it most likely isn't anything I wanted posted where my name shows up. I know this sounds unfriendly, and I'm not unfriendly. I like people. I just also like to decide what shows up on my own page(s).
I'm not a fan of feeds either. Basically (and oddly, maybe), I prefer to go looking for whatever I want to look for - not have other people post or feed stuff I "might" be interested in (because it's pretty rare that I've ever found stuff someone/something else assumed I "might" be interested in at all interesting).
If we ever get walls here I'll be keeping mine "nice and clean" or maybe disabling/making it private if at all possible.