Ahhh motorpsycho,
i am sure your logic will work terrifically with the next police office that pulls me over after easily hearing the sound of a "good loud" engine in my push bike, then writes up a ticket for it's illegality:
$1000 for unregistered motorcycle
$1,400 to $2000 for driving whilst unlicensed if not having a motorcycle licence.
$2389 for confiscation of the motorized bicycle under the anti-hoon legislation (in Australia) for exceeding the motorised bicycle speed limit of 20 kilometers per hour (12 miles an hour) by more than 45 kilometers per hour (27 m/ph) and a $600 cost to get your bike back plus the impound costs, if you happened to be coasting downhill at 65 k/ph (40 m/ph)
$4000 if driving a motor vehicle whilst disqualified, as some people use motorised bicycles to get to work and back whilst on licence suspension.
Then we have the EPA fines for an exhaust system that does not comply with regulations.
Oh yes, all the more reason to make you bike stand out in the crowd, attracting the attention of a police officer, if not for the fact of some disgruntled neighbour (that likes his peaceful and law abiding neighbourhood) informing the police of your "good loud" motorised bicycle, requesting him/her to bust your arse, with every ticket in the book, as well as the other motorised bicycle riders who are trying to fly "quietly" under the radar.
Three cheers for "good loud"