The German activist group, the Independent Center for Privacy Protection (ULD), which protect Internet users privacy, claims that Facebook is using the Like button to track their users interests.

The group argues that the procedure is illegal under both German and European data laws. According to the ULD, users must be aware that when they click the Like button, Facebook saves the information so that it can be used to create a profile of the users interests.

Facebook’s Like button is used on Facebook to like other users posts on the service. But it is also possible to add the button on external web sites so that visitors can express their interest in specific content.

In the press release, the ULD stated:

“The ULD expects all website operators in Schleswig-Holstein, that they immediately cease the data cascading over her to-use Facebook in the U.S., by disabling the appropriate services. This is not done until the end of September 2011, the ULD will take further measures.”

and they added that:

“The maximum height is fine for violations of the TMG at €50,000 ($72,000).”

Facebook does not agree with the claims from ULD, and has no plans to change the functionality of the button.

“We firmly reject any assertion that Facebook is not compliant with EU data protection standards,” a Facebook spokesperson said in a statement. “The Facebook Like button is such a popular feature because people have complete control over how their information is shared through it. For more than a year, the plugin has brought value to many businesses and individuals every day. We will review the materials produced by the ULD, both on our own behalf and on the behalf of web users throughout Germany.”

(via IDG News)