They often just encrypt the avi file, and provide an exe called "MovieDecryptor.exe", or even "CodecInstaller.exe". Sometimes the movie is even nothing more than two hours of a screen showing a URL to visit. Very rarely, I suppose, they might try to exploit vulnerabilities in movie players though specially crafted AVI files, or whatever, but I suspect that's just simply too hard for most people. Especially when the exe files will catch plenty of downloaders.
I've seen the above methods used often, but I've never seen a file called *.avi.exe - not sure why, it seems like an even better method to me.
There will always be the homeless
Why would you believe that? Houses aren't even all that expensive.
They do keep their proprietary OS from running on other hardware.
Do they do this actively, through cryptographic techniques etc, or do they do it just by not writing drivers for other hardware?
the music is available to all users, etc, etc.
The kids strongly dislike the music I listen to, and the feeling is (somewhat) mutual.
Airdrop has never worked well for me
Me neither. What is up with that feature? It's a total disaster.
Most people are wrong.
Create apple ID accounts for your kids, and gift them apps if they need stuff. Create gmail accounts for your kids, so they can have their own email addresses. Put credit card information in neither, of course. Put two factor on everything, because kids always choose crap passwords, and make sure you store those passwords somewhere safe because kids can't remember anything. This makes life far, far, simpler. Having one account seems simple at first, but rapidly becomes a nightmare.
The idea of having my kids signed into my apple ID on their devices (which they have to have for school, by the way, before you start telling me that kids shouldn't own iPads etc) is a terrible one. A friend of mine managed to allow her kid to run up huge bills, precisely because she'd used her own apple ID on her kids ipad, and the kid bought $500 of in-game nonsense without her knowledge.
The issue isn't the removal of the headphone jack - they've been a terrible and unreliable piece of technology for decades. Professional gear doesn't use 3.5mm jacks, it uses 1/4" jacks, or XLR leads, or optical, or whatever. I don't use a 3.5mm jack on my work machine, I use a USB headset. Minijacks are fragile and crap. Even now, if you pop around to a non-techy person's house, and fancy putting some music from your device onto their stereo, the chances are that they won't have a minijack connector, and you'll be using bluetooth, or you'll be out of luck.
The issue is that it hasn't been replaced with something standard. The Lightning connector is an Apple controller digital interface, that no other device, not even their laptops, support.
God may be subtle, but he isn't plain mean. -- Albert Einstein