In reply to springfall2008:
There is some really clearly marked signs about not parking outside the bays, rec and video by the ticket was fair play. I believe it's to safeguard access for emergency services.
The issue is more that there's probably only space for about 50 vehicles along the whole length, and nowhere further away you could realistically park and hike in.
It's extremely popular with walkers and climbers and can be quite difficult to find a space on some weekdays, but you've got absolutely no chance at the weekend usually.
There are plenty of areas they could indent and add further legitimate parking, just as Dan said.
instead they don't do anything with it and just roll along ticketing everyone every few weeks.