Herbert F. (84) has been in a Taliban dungeon in Kabul for six months: the right-wing extremist blogger from Vienna had traveled to the Islamist country in the Hindu Kush despite warnings. He had wanted to show that, contrary to the opinion of experts, Afghanistan was a safe country of origin and that refugees could be deported there without hesitation - and proved the exact opposite.
I suspect he would like nothing more than this to be as public as possible, so I don’t think he will sue. Since my interest in this only really extends as far as “haha, that guy” I’m also not going to actively look into it ;-)
I don’t think “standing” exists as such in civil law countries (as most of Europe), that is mostly a common law term.
But AFAIK the only one who can sue for this are the “injured parties”, i.e. those about which untrue or defamatory things were said or who’s identity was revealed without proper consideration of the pros/cons (because the right to anonymity in this is far from absolute).