I've often commented in the past, both here and over on the SJGames forum, about my view that the IT industry has gone seriously off the rails on multiple levels. In one sense this is just more of the same, but I do think Google, in particular, has a problem with this particular sort of creepiness:
It's partly money-driven, the users of free Internet services like Google are the product, not the customer. Gathering information on them to sell to others or use to target advertising is Google's reason to exist.
(Note the irony of this discussion happening on a Google-owned service...)
But it's also, IMHO, partly rooted in the social culture of Silicon Valley.