The guild of one of my toons was called "Naga Slave Pens" for years up until today. Apparently, someone complained to Blizzard and so Blizzard changed the name to something random and then charged the Guild Master to change it. The guild was named after an area in Outland called "The Slave Pens" that features a lot of, you guessed it, Naga.
I'm still scratching my head.