data sold to the malicious third parties? your personal data? >> yes. >> the 33-year-old ceo signaling he's open to government oversight after lawmakers trust and transparent. >> you have to be careful what you put in place. >> it is practically impossible these days to remain untracked in america. for all the benefits facebook has brought and the internet. that's not part of the bargain. >> some not satisfied. clearly frustrated with zuckerberg's lack of answers how to protect data. >> yes or no, is facebook changing user default settings to be more privacy protect sniff. >> this deserves more than a one word answer. >> again, that's disappoint to go me because i think you should make that commitment. >> others saying he cares about his bottom line more than the security of his users. >> i worry when i hear company's