After speaking to both Hanzo and Longshot, I have concluded the following;
Hanzo, in the situation that was described not only by yourself but also Longshot, you had in fact Joined a Gunfight, however I do agree that in this situation, a chat should of been opened that way it could of been clarified in-game.
That being said, after speaking to the both of you, Longshot and I have decided to removing your warning and issuing this as a verbal warning due to you being a newer player to our server.
Once again, you did break one of our server rules, which at the time you stated you did not in fact know about it nor the rules, which were linked after the punishment had been decided, so please take this as a reminder to read our server rules and make sure that you're aware of them for next time you're on our server!