I disagree that you are inherently in a worse position simply because you dont know enough to take a peek at the code or harden things. I think that again, simply being such a massive project linux gives a trickle down effect to normal users. Even as a normie, you are safer on linux than on windows, full stop. As for github scripts, thats an entirely different subject because yes, open source CAN be dangerous still (just like proprietary can).