I didn't personally do it, but when I was young I know of two of my good friends that the radios couldnt catch. Both got away from police by just opening it up and running.
And yes, I have heard of tailight cutoff switches.
The entire cant outrun a radio is based upon
1. There has to be more police ahead
2. The ones chasing can maintain a visual on where their prey is until the prey can be caught by #1.
Once the prey is out of sight, the chase is pretty much over.