A quote from a motion for a resolution at the European Parliament:

(...) Whereas weblogs are an increasingly common medium for self-expression by media professionals as well as private persons, the status of their authors and publishers, including their legal status, is neither determined nor made clear to the readers of the weblogs, causing uncertainties regarding impartiality, reliability, source protection, applicability of ethical codes and the assignment of liability in the event of lawsuits, (...)

[The European Parliament] suggests clarifying the status, legal or otherwise, of weblogs and encourages their voluntary labelling according to the professional and financial responsibilities and interests of their authors and publishers; (...)