so? they can't really say anything about you entering at 20mph, accellerating to 50mph and then backing down to 20mph again.
They should embrace tunnel runners really, cos they could offer like 3 for 2 Pass-Thru deals, so you'd get the revenue for the toll but also keep us happy, well sort of.
Or organize 2am Tunnelruns with a percentage going to charity, or summat like that, lol