What is worse, your data being sent to people you know or to people you don't know?
Why? Because I know Google has systems in place to detect sysadmins browsing in data unrelated to their job and I know they have fired people over it even if was tought to have been done with good intentions.
Edit: as for tracking I wish they would up their game and stop providing ads for <insert eastern country here>-dating.<tld-of-the-day>
I wish they would take into consideration that I am happily married with more than 3kids, belongs to a subset of the population that has way less than 10% divorce rate and I might even be in the market for a new car at some point.
In fact I would even tell them if they asked.
At the interview for my current job I was asked how I'd secure a remote service. My first response was along the lines of "Ask someone who actually knows about security, because I know just enough that I'd probably mess it up".
Smart, connected things? Yes, maybe.
Smart things connecting over the Internet to a corporate cloud? Hell no.