The author of the blogpost in another comment around here said he aliased csvtool to cat, hence cat'ing a csv. That said, unless there's another CLI csvtool program, the one I've read about can't plot. But there are CLI plotters out there.

Anyway, like I said, I'm not trying to say the post is factual. Just trying to point out that the fact that he cat'ed a CSV and got a plot isn't that big a deal (and shouldn't really be an indication of fraud), in a world where so many of us customize our working environments.