Once you willingly hand over your property to a third party and give them permission to use/look at/access it, 4th amendment protections go out the window.
If you are dumb enough to hand your child porn filled computer to someone who's entire job is to look at the computer's files and system to figure out what's wrong, not only does the Constitution not protect you, but they probably have a duty to report this to police or become accomplices after the fact.
Like I keep saying, Marty, quite a different matter if it is a software issue and they have to be going through the operating system looking for application conflicts and stuff and accidentally come across illegal stuff. But no ethical company would be opening files and folders that do not concern them, just to see what is in there. That would be akin to taking your car in to your mechanic for an engine problem, and while there, the mechanic rooting all through your glove compartment papers, looking under your seat and rooting all through your trunk for anything valuable.
Considering how dumb these guys were in the first place to hand over a computer with illegal content over to someone, I have a feeling they didn't do much to hide the files on their system.
And guess what? You give your car to a mechanic they can actually do that, considering in some cars the fusebox is in the glove compartment.
You are simply rationalizing now. You don't know any of that. Let's say you have porn on your desktop because it's easy to access there never suspecting your computer might crash! That doesn't necessarily make you dumb, do you really think most people think that far ahead? Once your computer crashes, it's not like you can go in there and move it.
But we keep dodging the real issue here. Now, if you just happened to be a child pornographer who was actually USING children and taking pictures of them and running a business making money selling the stuff out of your computer (which is the kind of stuff the FBI should already be looking to detect and stop on the internet), that is one thing. I have absolutely no disagreement that if I was a tech and found such evidence, I would call someone; they wouldn't need a "law" for me to do it. But what we are talking about here is a totally different thing: some guy who is an insurance salesman or a plumber who just happens to have saved some porn he came across freely available and floating all over the internet on his computer. What is served in reporting him and busting him? For what, using the internet? For saving pictures that are already saved in 10,000 Google servers around the world? But what about the FBI "ordering" Best Buy to report porn? Sounds like a good thing, but many bad things start with good intentions. I'd wager that ZERO percent of anyone caught by Best Buy was actually contributing to or creating the porn themselves, they were just average people like you and I.
But if the FBI can do this, go after average people for just LOOKING at porn and ordering others to report it to them because that's a lot easier to do and makes it look like they are doing their jobs when in fact it does NOTHING to the real porn problem ON THE INTERNET, then, why not just take it to the nest logical step? If you find no issue with that, then would you be OK with, like random drug tests by your employer, if the FBI started doing random house searches? Why not then just have the FBI go around at random, show up at your house, demand entrance without warning, and search through your computer and smartphones for porn, then take you away if they find any?
WHY STOP THERE. Just let them search your whole house for any evidence that you have or are doing ANYTHING against the law? You see, there are no many laws now that I bet they could find you breaking at least one of them! Any person reading this is, I'm sure breaking some kind of law somewhere, whether they even know it or not. So let's have Big Brother come in and shake us down every now and then. Take father away in the middle of the night because the State didn't like something he was doing.
Isn't that a bit like Trump? They don't know he broke any law or committed anything wrong, they just suspected him, accused him, then sent Mueller in there now to shake his life apart top to bottom until they find SOMETHING to justify the investigation. Is that Your America?
YOU SEE, IT IS THE SAME THING. Just now, the robes have been taken off and it has been unmasked for what it really is. It isn't a question of defending porn, it is a question of how they go about it and whether private use is really the issue instead of those who ACTUALLY CREATE THE STUFF?