I created a BD guild called "Cadaverous Union". Everyone loved the name, and we had like 110 members in a day, amazingly successful staff. A few days later while I was in class, my co-owner texts me asking why I deleted the guild. I get on and see a warning from TNT saying that they don't support my guild name. Apparently "Cadaverous Union" refers to a collection of the deceased (dead) or zombies which isn't allowed on Neopets.
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So apparently you can't use it in guild names but you can drink the remains of these dead people. Nice job TNT.