DVD players used to be (probably still are?) region locked, and those didn’t require internet service either. The region was either hard coded or could only be changed like 5 times.
It was an attempt to enforce geographic licensing fees and stop piracy.
If you run out of RAM and have swap disabled, then some program must be killed to make room. That’s handled by OOM (out of memory).
Whatever got killed might have been important, and you as the user don’t get to pick at that point.