Putting Words in my Mouth : World of Warcraft General Discussions

I was playing WoW with a party and I we were finding alot of good stuff. And as I look at my screen at the chat menu it says that i said "Give (insert name here) all the items because hes real cool and is way better then me". I was shocked i definetly did not say this and havnt typed anything for like 3 min.s before. If ayone knows how to do this plese tell me, my friend "hacker" of a friend found about this and wont tell me (he wants 20 bucks) he goes around talking under my name saying things like "im a complete !@#$%^* and rape my little brother all day" and i really dont want to get banned and im tired of people thinking i have split personalities when i tell him to shut up. If you have any info or know how to do this PLZ post it here or if you know a website where i can get it for free plz post that too. I really really, really want to get my friend back.