Was working on my site and noticed another GA code popping up - UA-12964573-5. This is alarming as it means my sites analytics are being sent to a third party without my permission. Upon further research it appears that this code is being placed by the Shareaholic plugin without clearly identifying that this is what is happening.
I have now removed this plugin from all of my client websites and will not be using anything related to this plugin creator again. This constitutes a serious breach of privacy by the plugin creator.
There are other plugins that track information such as the Yoast SEO plugin but they do this in an Opt-In manner and further use a much less invasive approach as you can read about here - http://yoast.com/yoast-tracking/
Going whole hog and grabbing all Analytics data from a website is well beyond gaining simple insights into what version of wordpress is being used.
I see that this was brought up 2 years ago - http://wordpress.org/support/topic/plugin-sexybookmarks-hidden-googleanalytics-code-in-v329?replies=4 and that the response from the creator was that you can simply turn it off.
This is something that should be off by default.