It seemed like this person was pretty damn annoying every time I saw them talk. I don't know if they're doing it on purpose or if they just can't behave differently. But, if they can't explain why they're doing it, no one else can explain it or justify it either, and that reason isn't a good enough reason for why they can't or won't stop, then yea. Banned is what happens if you can't get along in a chat room.
If someone wants to charity case rehab them into a minimally non-annoying chat room participant, then they need to speak up.