What's the point? If you want privacy and security because you really need it (for real reasons, not because you don't want the botnet to see your collection of animu and hentail), you can just live boot something like TailOS.
Most people seek easiness and software support, and we can't argue that both Mac OSX/Windows has much better software support, a bigger user base and is arguably much easier to use in general that GNU/Linux or BSD.
Except tweaking the aesthetics of your GNU/Linux [to brag about how your memeOS looks much better in /desktop/ threads], rare miscellaneous shit and open source, you already have 99% of users that haven't much interest of running a different OS than Windows or Mac OSX because they aren't try hard tweaker and just want something that works.
In the end, the most important thing is not the OS, but the tools you use. You can also use open source software on Window/Mac OSX and fix the botnet with shit like this http://goo.gl/TBzG91/
if you want. People completely discrediting mainstream OS just because of "mah privacy" and "mah freedom" are just the computer science version of feminists.
No wonder that GNU/Linux or BSD are used by a minority. It has its good points but most people don't specially need it, although if you don't do productive tasks and just browse Internet, your OS choice then doesn't matter much. Also, if you are a retard and have problems with your Windows or Mac OSX, don't think GNU/Linux or BSD will magically solve all your problems.
Call me a shill if you want but that's just my opinion on what OS is the most work efficient after having used each OS.