Obviously since this is a M/C forum there is a M/C bias but what about the other 98% of the population the police are supposed to protect? The self-importance of the 2% that ride is laughable.
People post about their new exhausts, how loud they can get and still be barely legal. Surprize!!! 98% of the people don't like you. BTW it would be a pretty good bet that 98% of the loud pipe types don't race their bikes on a legal track.
One noise maker on a loud bike can disturb five or ten thousand people just wanting some quiet time.
I see a bunch of V-twins and what appear to be aftermarket pipes. Add to that, the OP's friend rents his place while the cop and other area residents probably own their homes and have vested interests in the place.
A person has to have a pea for a brain if they can't relate loud pipes and aggressive riding to some form of retaliation and lack of sympathy.
Some twit on this forum actually suggested we motorcycle blockade Queen's Park to get public support for improved insurance treatment. Brilliant thinking. Annoy 98% of the people that you hope will help you.
Did the cop do anything illegal?
He recorded plate numbers. It may be illegal to run them through the system without cause but to accuse someone of writing something down is groping for it. However the expense of calling in backup troops is hard to justify.
I have to worry about people throwing out gravel in country corners because of the A-Hs pumping their self importance. If you're important you don't need loud pipes.
Flame away, flatulence is flammable.