German Blog Netzpolitk features (in German)Tactical Tech's "Me & My Shadow." Below a translated excerpt of the article:

Regular readers of this blog should have learned by now that protection of privacy is not first priority for social networks because they often consider personal data as a form of online currency which users pay with in exchange for services provided. Furthermore other forms of communication - such as Cell/mobile phone contracts and Internet landlines - increase one’s “digital shadow”.

The “Me & My Shadow” project provides a beautiful visualization on this topic, which allows even non online/tech savy users to see the extent of the excessive data collection by service providers. “Trace My Shadow” lets one see with few clicks which personal data is tracked and collected by data collectors.

The graphic illustrates very nicely that the more personal data one reveals the larger and threatening the shadow grows. In addition there is a “Shadow Tracers Kit” with a selection of Tools and Services, which should help to limit the threat and explain excessive data collection.