Illusions, this is a really incongruent point. The fact that almost all of us don't reveal our true identities here is a choice, not an act of coercive government censorship. As Fuzzy points out, some people may be peer-pressured not to have their real identities here (EG I fear social and professional ostracization if my political views were known). But that is at best self-censorship and entirely not the issue being forced by the German and Spanish government.
This forum has (and Atard had) written and unwritten policies about protecting personally identifiable information that is let loose or regretted later. But there is a massive difference between not posting information about yourself and the government actively restricting your right to post anything about anyone.