I definitely have an Orson Scott Card (non)shelf, but that was easy for me, because I didn't like/understand Ender's Game, and so feel no qualms about not reading him. Ditto authors who racefailed and whose books I've not read; they go on the OSC [do not buy/do not read] shelf. It's when I like the work that's more of a problem (and if the problem is in the text, for some reason, if I like other parts of the story enough, I find that far easier to deal with than the author failing outside their books; possibly because the former can be attributed to ignorance? and the latter seems to happen especially when the author is informed of their cluelessness/offense).

I think there have been some discussions of racefail in Romance on Smart Bitches, Trashy Books but nothing consistent.

Yeah. It's not one of the factors they look at often when they review books or talk in general about the issues in romance tropes.

They did take a few book to task for their completely ludicrous portrayals of various Native American peoples with the words "savage" or "wild" in the title as well as the absolutely laughable content inside.

IIRC, that was more due to plagiarism (and terrible writing) than racism, though, and I seem to recall ferrets being involved...