I do think the author's ignorance was a bigger problem--both in the sense of he should have known better and also in the sense that the PSL needs to be more discoverable--than anything Google('s automated systems) did.
However, I'm now reflecting on what I said as "be careful what you wish for", because the comments on this HN post have done a complete 180 since I wrote it, to the point of turning into a pile-on in the opposite direction.
> also in the sense that the PSL needs to be more discoverable
Well, this is a problem that caused the author's ignorance but you present it as though it's the other way around. That's primarily what I meant. Not really disagreeing with "should have known better", mostly in the sense that user-generated content is a huge yellow flag.