As the author was kind enough to pick us as an example, here's some background on what some of those requests are doing. hits.theguardian.com points to our Omniture implementation, which is the main tracking suite used for macro-level reporting (like when we say we have X unique monthly browsers, or whatever). So if you want to be invisible to that, leave it blocked. ophan.theguardian.com points to our own analytics…
Sounds like RFC 3514, only negated.