*Well I have been using Ghostery (http://www.ghostery.com) for some time… it is a way to see what sites are tracking you and how they might be doing it…
So the below site wins… everything in the Purple box is some sort of tracking.. some are not an issue others probably not so much… but its interesting to see…
Most interesting part is G+ – has a score of 0 in Ghostery…. they are not even running their own analytics code it seems.. or simply they are much smarter than the extension…
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Most social networks including G+ and Facebook write their own analytics based on the data you feed the system…