Just in terms of answering the question off the top of my head:

[Stuff](#s "Wildbow very clearly favors LGBT - it's probably the closest thing you get to an outright open author position in the story and the closest it gets to preachy.

Gary Nieves seems to stem from WB's opinions on Republicans - as being against everything without offering any solutions. The hostile foreign government interference mentioned below might be a reference to the suspicions regarding Russian interference.

Cheit 'the planet of religious fanatics' seems like a can of worms from this perspective. I'll give WB some trust but I can see where it'd turn someone off.

This is off the top of my head, and I'm ignoring stuff that requires some reaching given his tendency to focus on morally grey aspects. I'm avoiding extrapolating too much unless I've seen WB comment to the effect. (I.e. Purity is a morally grey character, but it doesn't mean WB supports racism any more than Bonesaw's complexity indicates that he supports serial killing.)")