I didn't find any band banned, but labels such as Toothless Yid Records (big surprise!?) appear to be banned. Yet to find any particular band, even if there is probably much more offensive (and even illegal) bands than any labels.
It's hard to say what kind of money flows through Discogs, but I'm sure they can make this type of actions what hardly effects negatively to their income. It is curious situation in industrial, though. Labels who have made all kinds of releases, could they be banned due one or handful of releases? Or does it need to be the "red line" within label? It makes more sense in case when labels sole purpose is to release & distribute questionable material.
F&V sells via their website, so this doesn't affect label itself. People who want to get the (new) releases, should just rely on old style of ordering things. Contact label or their distributors, pay with bank or cash.
However, it is kind of surprising that such amounts of "hatemusic" is generally accepted on discogs. I'm sure it is merely matter of time when it goes down. Similar to ebay being the biggest source of questionable WWII collectibles until they banned it all. "Hatemusic" appears in US ebay all the time, but german ebay is very strict. I think it's not such a big problem that noise releases are sold within noise mailorders and on classified sections of noise forums. Discogs is useful tool, but hardly absolute necessity.