Is a Mac safe from government Peeking or this?

[kyle]

We believe that some bad trojan? or whatever it is has been taken on by our entire houseful of regular pc's and laptops. It's Windows XP and 7. One of them got so irritated when I discovered it, that locked up all ways to access the internet, and froze up all programs. Then another pc gave me my first locked up blue screen, which I've never had since using XP, for 10+years. On two computers, I got them to work, after lots of trial and error, but they're definetly not the same.
So, it sounds funny, but in this world, I guess anything is possible, is a Apple Mac safe from either government, military, or browser spying (such as Yahoo, via employees)?
I guess it's not called Yahoo, "browser"., but just called "Yahoo".