What amaze's me about this is thread is the
OP has based it on absolute "heresay"! You said you approached the cops at one point, well, what did they say?
At the end of the day it won't matter how innocent you claim to be, the cops will do drive by's 'till they stop getting complaints or they catch the culprit. If your exhaust is loud then I have no doubt your abusing this fact, most likely in your street too 'cause that would be your "comfort zone".
FYI, a noisy exhaust is the quickest way to gain unwanted attention.
I'd say you've dug your own grave buddy.