It would have to be done by weight. If you had a button to not allow stopping for others, people would abuse it. If it was a camera, security issue. Presumably if somebody is moving a piano or something else heavy it'll be fine
You could also detect when the elevator call button gets pressed again right after the elevator has left a floor. That means someone wasn't able to get on the elevator (and is now waiting for the next one).
I mean this in the nicest way possible. Do you see all these cloud photo/video leaks like from robot vacuums or whatever and think they don't know it can be done locally?
