Harleys and straight pipes

[Rob V]

I'd like to know what the deal is with Harleys and why their new owners immediately remove the stock, muffled, exhaust system and replace it with straight pipes?

I'd also like to know why they get away with it?

I mean, if I did the same thing to my car, I'd get pulled over and handed a ticket PDQ. So, why do cops seem to ignore Harleys? Is it because a lot of cops HAVE Harleys? What's the deal???