Hey...you want it straight from a police officer that patrols every day on the streets, there ya go.
I sit with others as we write reports, talk, etc. and it is like any other normal person out on the roads. Noise brings attention. I won't notice a silent red vette flooring it a block behind me. BUT...a pink whatever flooring it with a SLP loudmouth exhaust is going to make me and my buddies turn our heads. It's really as simple as that.
The quieter the exhaust you have, the less attention you bring to yourself. If you want a loud exhaust, you'd better look around real well before flooring it!