The sysops on
bg.wikipedia.org (especially Borislav) have taken it upon
themselves to correct for the lack of publically available referrer and
IP information, by including a web bug in one of the MediaWiki messages
that is displayed in every page. They say they are only logging page
view statistics and search engine referrers and not editor IP addresses,
but there's no way to be sure of this.
I've made my position on this perfectly clear on
http://tinyurl.com/dr844 -- I consider this to be an unacceptable risk
to user privacy and I'll do whatever is necessary on a technical level
to prevent it.
-- Tim Starling