To keep officers from getting suspicious, you’ll want to slow down and let them get a reading off of your vehicle within a few seconds. (3-4 seconds max is recommended)
Even in areas where laser jammers are legal, in order to ensure they stay legal, it’s best not to poke the bear. In the past, people have gone around intentionally jamming officers has only led to laws being passed making them illegal in those states.
See this video for more info: