In SV speak, aren't food trucks disrupting the restaurant industry? I mean, people praise AirB&B, and the taxi compny (I forget ther name), but the food trucks are doing the same thing: Gaming the system. Oh, I see, we just need YC to launch a food truck startup for it to be OK.
Have you ever thought about it from the other side? Maybe these people want to open up a real restaurant but can't due to draconian laws? This is their way of disrupting it.