I've only been stopped once in the last 7 months,( which is as long as I've got the car) and that was just a random tax/insurance/license check and it was in blanchardstown which is pretty notorious for young speeders in civics etc so I wasn't surprised to be pulled over. Most people turn a blind eye to my car because it's not a coupe/hatch/normal car shape. I've often stopped at traffic lights next to guards (with quite a loud exhaust) in the Foz and the guard might not even turn his head to look at the car. If it was a civic with a straightpipe I'd imagine it'd be a lot more eye catching.
I wouldn't let things like that dictate my choices of exhaust (to an extent obviously) because if I am stopped, I know everything is in order with tax and insurance etc so I've got nothing to worry about, and if I did get hassle over the exhaust, so be it, I can't imagine it happening to such an extent that it would force the removal of the exhaust from the car.
There are hundreds of scooby drivers in the country with exhaust set ups similar to the one I've got planned, and I like the sound of their cars, so I want that for my own, I'm not purposely going out to buy the loudest exhaust I can find, but I'm also not going out of my way to quieten it. I was limited in choice for a backbox in the sense that the H&S backbox is too similar in sound to my current backbox, and the blitz nur spec r is on the pricier side, the fujitsubo legalis R is again too similar to my own sound, so I wanted something a bit more raw, which is why I chose this exhaust.
Even though my own exhaust at the moment is loud by my standards, I can still drive in a way that makes it seem quiet so it's less conspicuous in the presence of the law.