Question 4 had a different response, though: 70% agreed with me that they would fill in the poll and then press the `back' button to get back to the Friends page, rather than loading a new copy of the Friends page - which three people said they would do. One of those three actually told me I was silly for using the `back' button (which I don't understand at all, and I'm glad that the results vindicate me!). But it's clearly the only way to do it consistent with the above philosophy. The `back button' is, after all, the second most used navigation feature on the web (where the first is clicking on a hyperlink).
Anyway, assuming I've just done that to return to my Friends page after filling in a poll, reloading the Friends page shows up a small quirk in Mozilla: it tries to preserve your form entries when you reload a page [though I still haven't worked out why some form entries and not others seem to disappear when I revisit a form that I filled in earlier, particularly on Google Groups] but of course LJ replaces your filled-in poll with the poll results, so it's entirely possible for your filled-in form entries to reappear in another unrelated poll on your Friends page.