Thats fucking stupid?? Since when has stopping at the side of the road by 2 cars been illegal???? If you had 150db of music pumping or you were revving your engine then fine as that can be construed as anti social.
That is rediculous as you could be following your mate when he pulls over to answer his phone or ask for directions and you could get an ASBO?????
Thats got to be worth a formal complaint to the plod.