I'm torn on this. On the one hand, yes, it's easy to see accidentally recording when they really didn't mean to. On the other hand, have you ever heard of Google recording less data or giving people more privacy by accident? If "mistakes" always favor one party then it seems fair to start blaming them. On the third hand, would you hear about that if it happened? I mean, what would that look like? "Oh, today's ads are slightly less targeted"? "Oh, Google location services doesn't automatically place me by my wifi WAP"? Negatives aren't just hard to prove; they're hard to see in the first place.
So I'm skeptical, but I don't know how to have enough data to really be sure.
You mean has Google ever lost data? I'm sure it has.
Has Google ever "undertargeted" ads? Obviously yes. Every single outage in an ads system makes it target less well, basically.
And there was that time Ads preferences for basically everyone seemed to indicate that I (along with everyone I knew) was interested in "Raggeaton", whatever that is.
So I'm skeptical, but I don't know how to have enough data to really be sure.