well, if he wants you to stop punching him, i guess he has the fullest right to report it. It's just a warning from his side, saying: 'man stop this shit, I'm not in the mood'.
If you are punching someone, I guess you are in a quite happy state of mind, so you shouldn't bother if some people don't want to 'play with you'.
A guy was hitting me earlier and doing very little damage, but I got annoyed from the stuns and the sound so I reported him too. He stopped, that's it. no drama.