TLKY, I do not understand your questions, there are two separate issues being discussed here, Custom plates and Lights/Sirens.
I was referring to the custom plates which are nothing more than a nice license plate. Police do not hesitate to pull over a car that has custom plates.
Lights and Sirens are a different issue, they are only to be used in an emergency. People that abuse the L&S are usually not members of Hatzoloh, using L&S in an unauthorized manner is illegal and dangerous, the consequences are big.