That's great, as long as you aren't the first one under their radar. I have used it in the past as well.
If you are in a string of cars exceeding the limit, the police will usually stop the last one. This is what happened to my wife.
That's weird, I would go after the leader. I once got pulled over by a hot shot trooper, he would point multiple people that were speeding as he passed you to pull over. The poor guy did a hot shot quick turn around one evening with the sun in his eyes facing west, and got killed by a tractor trailer, he took a rookie with him.
For those whose lives may depend on going undetected, there is a host of things that you can get, for a price, to decrease your radar cross-section. I've researched for years. You can, too. For laser, it's a somewhat less involved, but triple matt black could help. Stealth level depends on your level of commitment to the stealth game. For some, sheer speed is the (lack of any) ticket.
Freedom of movement is a part of the US founding laws. non-commercial drivers' licenses have been proven to be a violation of the Constitution of the United States of America, as is the forced insurance extortion, in cases brought to the less-Democommie Supreme Court of the last few years. While I'm at it, so also has property tax been proven to be unconstitutional.