I voted for Maciej fully believing that he had no intention of building a billion dollar startup and just wanted the 20k. That said part of the reason I voted for him is that I thought it could could be a good opportunity for YC anyway, albeit risky, in addition to just being entertaining.
I also think they made the right call not to fund him, given Kevin's explanation.
But they were looking for more than that, so I voted based on the question they asked -- who should they fund, not simply who should they give money to.
But I never thought that votes alone would decide anything; the original post explicitly ruled out that possibility.
If HN/YC wanted to do the right thing, they should have taken some time to assess removing Pinboard BEFORE voting ended. Instead, what they did was game their own system: They likely sensed Pinboard could be trouble from the beginning, but hoped they would not win. They attempted to achieve that result by letting the voting play out, and THEN disqualified Pinboard when the voting results were not in their favor.