Where available, the option to disclose personal or business data (e-mail addresses, names, addresses, phone numbers) is purely voluntary. The use of all services offered is - where technically possible and reasonable - also enabled without disclosing such data or by entering it anonymously or under a pseudonym.
Use of Google
Any objections to data collection and storage by Google Analytics can be raised at any time to take effect in the future. For further details, please go to http://tools.google.com/dlpage/gaoptout?hl=de.