Andy_Langton - 12:11 am on Mar 5, 2013 (gmt 0)
My rule of thumb is never link to the current page from the current page. It's highly confusing.
In terms of your specifics, I don't like terms like "PR drain" at all. But I would say it is both a UX nuisance and a poor means to distribute your internal link value.
@Lucy - there are certainly ways analytics can tell. But most will record another page load in the same way as clicking a link.