Yeah but if you drive like a dickhead, then you pretty much deserve to get picked on/defected. That said, sometimes you can randomly get picked no and that does suck.
As I stated above, I have had 3 quite highly modified cars (coilovers, wheels, loud exhaust, mods) and drive my cars daily for work and pleasure, and have NEVER been defected. I don't do anything to make my car stand out too much or be obviously illegal, and I don't drive like a dickhead.