You are only going to get in trouble for it on top of whatever else you'd be getting in trouble for if you are pulled over. Obviously if you get a flat or something and break down cause your in a shitty car your pals will need to scram.
Cops need to pull you over for a reason.
The speeding ticket you get for going 20 over the limit will be a bigger deal than driving with kids. Or the fact you have .03% BAC and would pass a breathalizer if you were 21 but aren't and had kids in the car.
Worry about not getting popped for those kind of things bro which means drive carefully.
As I said its not a bad law if you ignore it but are careful when doing so it will make you a better driver and help you avoid bad habits when people are in the car with you (showing off speeding, smoking, not looking at the road etc etc etc.)
If you have a mangina and are too scared to drive everyone around and will be lame about it you shouldn't have started this thread for attention its obnoxious.