You've got to have "police" everywhere who need to be trained to identify when someone is going too fast. Who does enforcement? Actual police? You need a lot more police than normal. Airport staff? They're not enforcers. They keep the carts in the right location and bathrooms tidy. But, let's say you can have enforcers. So enforcer says slow down, kid says okayyyyyyy and then goes fast again right out of eye sight. But speed limits on the luggage! No way, so add an on/off button to comply because no one wants to buy only a slow luggage, but you've still got that person who "won't airplane mode".

Repeat offenders? Now you've just confiscated their luggage. That's gonna be good.

In this scenario, electric luggage == actual scooter. You don't ride actual scooters through an airport, but I've seen so many electric luggage scooters.

I admit they're cool af and everytime I see someone on one I'm jelly. They're their own advertising. But they're at an airpot and it's crowded for the speed. I'm already stressed enough - I don't need your kid running into me at speed.