Have you never used wifi at a coffee shop?
Physical access to networks isn't that hard to come by.
I have, but good luck predicting where I'm going to have my next cuppa. Outside of petty crimes mentioned, I don't see how it could be industrially weaponised to make actual damage.
Regardless, real bad actors are busy compromising your next `npm install` anyway. Much better reward.
Great, you have an inconvenient way to possibly-maybe see some random's gmail inbox at Starbucks.
You'd be better off just mugging them in the parking lot.