Exceeding the posted speed limit is also illegal, and few care. What's important is the consequence for getting caught. Provided you haven't angered the flight

Exceeding the posted speed limit is also illegal, and few care. What's important is the consequence for getting caught. Provided you haven't angered the flight attendant, he'll politely ask you to stop. Source: I found zero reports of someone getting in trouble for this. Just requests to cease.