I do not know what went on because no context is provided. There are chat logs of the one player only. I think it is unlikely that nobody else wrote anything, least of all the original poster.
I think it would be highly unlikely that the original poster did nothing wrong and got punished by a mod. I don't get that vibe from this site. I also had a quick look at the original posters' profile and there are a lot of delay of game penalties and a few ragequits. Therefore I think s/he is being disingenous about what really happened. That makes me think that it was fair.
Now I can be wrong but I don't think I'm being unfair as I was asked for my view and I can only go on the information that was provided and that which I can readily find. You might be right about the red thumb in which case it is possible that other players gave him / her red thumbs for little cause but as the original poster didn't talk about that I'm not going to speculate about whether that would be fair or not.