That is true, but I didn't do it that way for two reasons: one, because I've seen the user options get mysteriously "reset", once or twice while I've been using the program (I am not quite sure how this was accomplished, but it's happened to me a few times now) and I've wound up sharing again for whatever reason.

And two, because if you block sharing, other users sometimes get angry with you; I think that this way, it just shows you sharing, but without anything in your shared folder yet. I don't know if either of these reasons make a difference, actually, but I wrote this up real quick anyhow, and I'm going to try to extend it this weekend.