I would actually go so far as to say that the fine should have been much bigger. This is something that annoys me about tickets being a fixed amount: is it really a true deterrent to bad behavior when the fine is so negligibly small that you basically don't give a damn? The purpose of punishment is to reform bad behavior, bad behavior that is dangerous to others. When you're going 80+ kph above speed limit you're not just putting your own life at danger, you're putting other innocent people in the vicinity at danger too. A ticket should not be $400 at that point when you're a billionaire, it should be $4 million. $400 is likely not enough forceful enough as a corrective measure. In this instance I'd have been happier if the fine Parker incurred was above $25 million.
http://marcfbellemare.com/wordpress/2012/02/speeding-fines-t...
(The link is an interesting discussion of relative vs absolute risk aversion, with regard to tickets.)
History and celebrities have shown that when the courts think that, these people -still- don't think the rules will apply to them and will either lie about it, do self-serving "community" service, make excuses about how they can't because they are too high profile or busy, or out and out bribe people, either to do the work for them, or to fraudulently attest to their service.
The fact that he brazenly (and illegally) modified land designated for public use is pretty bad as well. Imagine if I decided to shoot a porno right in the lap of the Lincoln Memorial, setting up lights and cheap sets and basically making the whole monument look like a joke, ruining what would have been a solemn and sacred space for the general public.
Of course, I would also be shot by the guards there. There's no similar guardian for that particular part of the Redwood forest.