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An advertising company that "knows where you click", serves you customized ads and has full access to your bank account information strikes me as a step too far...Here's the thing though, you realize you just described Walmart right?
I mean, the HN crowd probably doesn't overlap much with the market that Walmart serves with their financial services, but it's actually a significant portion of the american populace. For them, Walmart is the marketplace, the ad firm, and the financial services provider all in one.
So what everyone's asking is:
1 - why is there no attempt to go after Walmart? or big finance?
and
2 - why are we doing this anyway, because what we really want is a HIPAA-like law criminalizing the sharing of personal data for commercial purposes? Such a law would be more simple, and would stop more privacy violating behaviors in their tracks.
These are very reasonable questions, given the assumed intent of the proposed legislation.