Okay so you specified when they decided to glitch. BUT did he say he didn't want to or did he say sure then report them because that would make him a LIAR and ENABLER which makes him a shitty person to be blatantly honest. Also when did he report the other players and quit the game? If he quit pre-glitch then he doesn't actually know if they succeeded and if he did it post glitch he was then apart of the glitch even if he didn't fully want to do it. Now finally IF they did glitch did he stay for the rewards because if he did then he should report himself and stop feeling all high and mighty when he is just as bad. (I can tell he didn't say no because the team would have instantly kicked him because people are like that in the raid) Conclusion: You're friend either backed out and didn't witness the glitch. OR He assisted in the glitch and either reaped the rewards or quit just prior and either way he knowingly enabled the glitch. A liar and/or back stabber, your friend seems like a real trooper.