I'm going through his posts again, he seems to have quoted bounty manager's post without referencing it. He was trying to help someone, at least that's how I see it. (can't say if this is the reported post or not).
~Snipe~
If this is the only reason of ban then I think he isn't deserve ban. Its clear that he was attempt to help someone and forgot to quote post. According to admin he should unbanned without condition. Not sure for which post he got ban. I will be happy to hear from moderators.
I know of one case where someone was banned for plagiarism in the recent massacre, but a very careful reading of the context showed that the person actually did just forget to quote, and by "quoting" the post they were expressing an actual point even if it constituted their entire post. This person was unbanned without any sigban, since this isn't plagiarism.