What the title says. If this is the case, even if you choose to delete everything OS X related and put entirely Linux in your box; you'd still be screwed. Hardware keyloggers sit between the keyboard and the motherboard, and record everything typed to memory (perhaps to be siphoned off to a remote server without your knowledge the first time the machine gets online) Also, macs are famously sealed-off black boxes that how it works under the hood is kept an intentional mystery by Apple.
Well, your thoughts, fellow mac-folk?