I desire attribution for my contributions. WTFPL, at least, seems to suggest that I would be OK with people plagiarizing, which I am not. Copyright should be abolished, of course, but I don't want to encourage people to take my work without attribution.

There are probably legal problems with it. Compare it with the similar CC0 license:
http://creativecommons.org/publicdomain/zero/1.0/legalcode
One sentence is not going to cover all of the legal issues. Potentially someone could sue us for using our own stuff.

WTFPL is less restrictive than CC-A, so legally copying material from the Bitcoin wiki would require you to get permission from all page authors.

I prefer CC-A -- including a link back to the page is not a huge legal burden, and it clearly indicates that plagiarism is not acceptable. No one's going to sue anyone, anyway. I wouldn't mind CC0 or any of the more restrictive CC licenses.