After reading a lot of other people comments on all the aspects of trusting open source or not I do believe now that even if something is open source does not mean it should be trusted by default. I am sure (could be wrong) that a lot of code in linux (shell & apps) would have never been peer reviewed or peer reviewed but by those who are not extremely good at understanding how things are hidden.

After all NSA has some of the brightest minds on its payroll and those guys sure know computers better than some people know the back of their hands.

But do the non-tech users and tech users (who are not great at programming) have a choice? We have to use what is available in the market if we want to use computers.