That being said, type writers aren't going away, either. Financial people love to use forms that require them for some reason.
I miss typing on them, actually. I wrote my high school term paper on one.
The police department in my home town loved them, too, for the CCW permit process. First time I filled out the paperwork, I noticed the instructions on the state form said to "type or neatly print". The local police department instructions said "type only". And if you didn't follow their instructions, they presumably wouldn't process the paperwork. I judged that it wasn't worth the hassle to fight that, especially since Indiana was (still is) a "shall issue" state. Later on, after typewriters had pretty much gone the way of the dinosaurs...they STILL required the form to be typed. I haven't been an Indiana resident for a good while, now, but I believe they've gone to pdf forms you fill out online.
Security is about layers. No one step is fool proof. I have a tool that pulls data off a drive. I pulled data off a drive after writing over it and formatting it a few times. The only way the tool failed was DOD type wipes or if the drive was encrypted. There are tools to get around that, too.
Security can be breached, always. Nothing is fool proof. If you have sensitive crap, pull it off the network and run an encryption tool. Lock down your home network. Run separate networks for guests/family...not separated by vlans, separated by layer 3. If you're truly paranoid, you shouldn't be on a computer. If it's on the internet, it isn't ever truly safe. All you can do is add layers. Just like physical home security. A dog isn't a solution. Neither is an alarm, flashlight or a gun. Combine them all and you have a layered solution. Computer crap works exactly the same.
If I was the kinda person who was into activities where I was worried about any of my computer files/hardware being snooped or confiscated by authorities, I'd invest the time and money for a physical destruction of all the hardware. And the important stuff wouldn't be online, either. Doesn't take but a second for a thermite compound to completely destroy something like that. But I guess people just don't think that way.
to answer a couple of those questions
i was reading a bunch of the comments because i thought the same thing. apparently the nsa can still get into an unconnected pc, dont ask me how, and they can also figure out the particular key strokes of electronic typewriters. as for being able to read the ribbons, yep you can, which is why you have to destroy them once you are finished with them.
There is a reason why IT security has minimum physical installation requirements on government networks that are installed...and this kind of stuff is why. If you run a (non-optical) network cable parallel and close to other network cables or data transmission lines (like, say, phone lines) it is possible for signals to leak from one line to the other. Routing and installation of such lines is important.