You might want to actually take a look at some of those recalls, they're pretty bogus (like the whole "bring it in so we can adjust the floor mats" thing). And yes, I do believe Toyota did the recall as a PR effort. Take a look at what Audi did instead. They, correctly, stated there was nothing wrong with the cars and they took an insane PR hit and sales plummeted. There continues to be no actual evidence of unintended acceleration in Toyota vehicles.

And I don't think HNers are somehow less likely to hit the wrong pedal or refuse to admit it. There's always that possibility that they don't even know they hit the wrong pedal.