Given the politicised theme, expect the ratings for the game to be completely out of whack… I guess there is no way to allow reviews only by confirmed buyers?

The actual reviews seem to be consistent so far.
That said:
I woldn't mind if only buyers would be able to review the games - given on how some of the good OLD games sometimes come in inferior forms than the original version (missing in game music, buga, crashes on modern systems, censorship, etc), it'd definitely paint a more accurate picture.
And yes, that would mean a couple of my own reviews'd land in the bin (sometimes I write here after buying the same game on steam), but I can live with that.