[ryanmcbride]

Extrapolate this, am I not allowed to accept gas money from a friend if I drive them around?

Of course I wouldn't be fined for that, but where is the line drawn? Do I have to know a person very well before I can accept their money for a ride? A friend of a friend? Will I be asked to answer a series of questions about the person if I am pulled over?

[TillE]

Running a business vs not is already pretty well established in tax law.

[johnrob]

If that argument were valid, none of the current taxi companies would buy transportation licenses or commercial insurance.