Why do you still have positive trust posted on his feedback page? If I were you, I'd neg him so hard his trust profile would look like a murder scene. Agreed, I saw his meltdown and think he's an immature idiot. But your warning and that positive feedback don't gibe.
The negative feedback should already be present. I did that 1 minute after this post.
--EDIT: Also, giving him a long list of negative trust isn't the right thing to do either. I just want everyone to be aware that no business should be done with this person. Spamming him feedback page wouldn't help doing that.
--EDIT2: Alright, thought it didn't save for some reason. Thanks for confirming it is now there.