Given the legendary meat-grind that is the Google interview process, perhaps people need to be tricked to overcome the initial aversion. Since Google can throw money at recruitment, they basically don't care about wasting their own time, which means they might waste quite a lot of yours.
And, let's stipulate that Google's a good company - there are going to be a bad apple here and there. I had to ask my friend who was a senior-director at GOOG to mark me as "do not contact" in their recruiting database to get them to stop calling/emailing me.
