Maybe the Reds, in general, don't want to bring it up because they are worried Siuan will drag out stuff about what they did during the vileness.

During Egwene's debate with Elaida, for example, this was not brought up because Elaida was probably worried that Egwene would bring up the vileness, and she doesn't want the Sitters to remember that now, does she?

Also, the few names we heard from Logain are likely Blacks. For all we know, a few Black-Reds did indeed encourage Logain on orders from the Supreme Council, and people like Pevara just did not know.