With all the modified vehicles I've had over the years and a few that were on the edge of being legal, I've found that things like tinted side windows (I'm talking CA here), tires sticking out too far past fenders, no front license plate (yes, in CA you MUST have a front plate) or other mods are just an excuse for law enforcement to pull you over.
When I was in my teens and early 20's driving over the edge modified cheap vehicles, yeah, I'd get pulled over just for fix-it tickets and to look inside my vehicle to see if I was doing anything else questionable (which I wasn't).
Although you are far less likely to be pulled over with something stylish and looks good, like tinted taillights when driving an upscale vehicle (Lexus, etc), so long as you don't have something all getto'ed out.