From the previous thread:
I'm telling myself there has to be a parallel universe somewhere where Ross does indeed avenge Diane, and it played out the way many of us hoped. That's the only way I can make what happened last night (in this universe!) bearable!
I don't get this though. Diane being murdered was just part of the game and she was obviously going to be targeted, because she was a louder character. Ok, she's his mum., but apart from that, there was no reason for her not to have been murdered. Ross was never going to be able to 'avenge' her death as a traitor, because he wasn't very good as a faithful either, and he certainly didn't deserve to win.
Also those saying it's obvious he was recruited later because he couldn't have murdered his mum - IT'S A GAME!