I am pretty sure that isn't legal...
I've only been pulled over 7 times. Of those, 3 were regular crown Vics, one was a jeep, one a tahoe, one a Camaro and one a Lumina. Of those 7, 2 were in PA, 2 were on the way from home to school, 2 were within 3 miles of my house and one was in my own driveway.
I can usually tell the cops, but because I've spent a decent chunk of change on them, I now set the cruise at 72 in a 65 and haven't been bothered yet.
2007 Saturn Aura XR | 1970 Chevy Blazer 4x4 | 1970 GMC 3/4 Suburban 4x4