Key addons for this are : BlockChinese, BadBoy: Spam Blocker & Reporter, BadBoy_CCleaner: Filter Crap From Chat.
Key words that I like to use and it has worked wonders thus far for a while now are :
+10, +10 - +15, mythic carry, arena wins, boost, boosting, carries, coaching, full clear, gold only, horrific visions, visions, key, mask clear, N’zoth, Nzoth, only gold, power level, power leveling, powerlevel, powerleveling, selling, whisp more info, whisper more info.
These are all individual when you input them into the CCleaner plugin for Badboy.
I know this post may seem redundant however I see alot of people asking about it in trade and in general chat, so I thought that making this post would help some of the few people that look at the forums that may want / need help with it.
So if this post helps out some people awesome if not its here for people to use if they want to.