You’re right the most recent examples are not of people attempting a dispassionate critique of a named fic. The SGA racism kefuffle started from a hit and run comment, the SM one from what only looked like an impersonal critique to outsiders at first and heatherly’s post critiqued a genre and possibly by naming no names got all kinds of bystanders up in arms. I do remember someone starting a journal to review Spuffy fics and getting flamed and withdrawing and I think there is an SGA community for reviewing fics quasi-academically. There’s a vid review community that works quite well (the_reel), I’ve done a stint on it myself. It’s quite hard psychologically setting yourself up as a judge on another fan’s work there’s a whole “what do I know, I’m just a geneticist” aspect to it that’s different from tossing off BSG episode reviews, or commenting on student essays or peer reviewing papers. There needs, I think, to be some mechanism in place for depersonalising yourself as a reviewer to get the critical juices flowing and fandom has an inherently personal feel to it that makes that difficult. It's not so much the external fear of censure as the internal fear of censoriousness.