I understand the theory, but loud pipes do not save lives. They may keep Harley in business, but between the doppler effect and increased sound deadening of newer vehicles, this is a justification for people to have lout bikes, nothing more.
On the other hand, the flashing headlights, accessory lights should be required on all bikes.
To the OP, if you buy a bike, be informed and understand the risks and consequences. I'd far rather have my kids on a motorcycle than a smartcar.