Ok, I'll bite. I used to live in Dallas. It's not really a secret that literally everyone speeds all the time on the highway. If you commute daily, it's not uncommon that you'll probably be going 10-15mph over the speed limit at some point. Of course you don't have to speed, but sometimes it's easier to stay in the flow of traffic and drive a little faster.

Most of the time, the cops are too busy with other stuff to sit by the road writing tickets for speeding. This is probably why there are so many speeders. It's barely enforced. However, on the 3 days a year where the department has had a slow morning, I wouldn't mind having a less conspicuous car. For the cop, it's much easier to focus on the bright neon green car and pull them over once they turn on lights and sirens and start following them.

Nobody wants attention from the cops, but it's also important to acknowledge the possibility. If you drive the speed limit perfectly, by all means, get a bright colored car. For most people, a little bit of speeding is a daily habit and statistically, having a car that blends in will lead to fewer tickets on average.