Is this against ToS?

I recently joined a group for Azjol-Nerub and we were doing pretty well. When we got to Hadronox, a member of the party suggested that we use a "hunter exploit" on the boss. I clearly stated that I have never heard of such an exploit and that I didn't want to get banned for doing so.

After about 30 seconds and seeing that the group was preparing to use the exploit, I pulled one of the groups of 3. The healer, who mentioned the exploit, died but we managed to defeat the enemies and move on to finish the instance. I didn't hearth and leave the group, I just pulled so they wouldn't use the exploit and stayed to fight.

In his fit of furious rage, he then made several inappropriate comments toward me including several curse words and refused to heal me. Good thing I had bandages and watched my threat.

When we killed the last boss in the instance, he whispered me stating that he had convinced each of the members of the group to report me for griefing and said "hope you don't get suspended" followed by a /ignore of course. He was being very smug about it all, trying to pass of as a good guy but he was cussing up a storm and insulting me, calling me names so his intention to report wasn't one-sided.

I then filed a ticket stating what had happened and that my intentions were good. I even included what he said, word for word as harrassment in an attempt to counter him. I would just like to know if what I did deserves disciplinary action as I didn't just leave them all there to die.

It sounds like a 12 year old that got angry about dying and filed a ticket as a way to get back at me. I've had people do that to groups I was in plenty of times in the past but I have never tried to report any of them, it sounds silly and immature. Any input on the subject would be appreciated, thanks :)