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They had it coming alright. Of course, the alpha is just as guilty for calling them the B word.
The only thing I do when I confront someone like this in the game is just take screenshots and report them right away. I don't care how old they are, how angry they get, or if they try to get others to pity them. If they can't behave themselves or follow the rules of the game, then they have no business playing the game. Simple as that. I've put up with these kind of players too many times.
I hope you know how to report someone. Seeing as how you bring up many of these kind of topics of all these experiences you have in the game, you should be able to take screenshots and report them as soon as you can.