I imagine if you brought noisy contraption that to a hackathon, a bunch of people working together in a room trying to cram out a project, you would make a lot of enemies very fast.
If a team really need quiet time at such an event, they usually retire to (the basement/a hotel/someone's garage/a coffeeshop).
And no, they don't just hack software demos at such events, I've come across (noisy) 3D printers, pinball tables, slot machines, robots in many sizes and shapes, RC racing cars, drones, you name it.