[jonnathanson]

There are three levels of discomfort some people feel with this situation:

1. Concern that a single, third-party entity (Google, in this case) might peer into every aspect of our lives, and/or reverse-engineer an exhaustive catalog of our entire lives, by virtue of data collection.

2. Concern that many consumers will unwittingly opt into such control, unaware of the privacy they're relinquishing, and unable to make informed decisions about the possible applications and consequences of the tradeoff.

3. Concern that the custodian of all this personal data (Google) might use, sell, transmit, or turn over the data in ways we had not anticipated or believed we'd consented to.

Personally speaking, I understand these concerns but also understand the potential upside. I'm not 100% sure where I stand just yet. The aforementioned bullet points are presented without editorial comment; just trying my best to articulate what I believe to be the crux of people's concerns here.