Especially in light of the recent KRACK problem. Wifi has been compromised before; and undoubtedly it will again. So I have to wonder, why don't criminal organizations travel around major cities, planting devices near by important wifi networks locations ready to start cracking as soon as the next exploit is discovered?
It seems like it wouldn't be hard to develop a cheap battery powered device you could drop in a nearby alley, so when something like KRACK comes out, I would expect to hear of a wave of credit card frauds, as the criminals drive through the city, planting their devices, and getting access to all the data before it can be secured. Yet this doesn't seem to happen. There must be a reason for that. So, I wonder:
What are the security methods in place, that prevent this kind of thing from occuring? How are criminals stopped from from doing massive, wide-scale attacks after each vulnerability is discovered?