Is it okay for motorcyclists to park their bikes on sidewalks?

Is this even legal? I haven’t been able to find any definitive answer on this question in my state (Florida).

Regardless of the legal question, what do you think about it? As a motorist, I hate seeing an empty spot, only to pull halfway in and realize that there is a bike there. As a biker, though, I wonder if people feel like I’m taking advantage. On the other hand, I’m being twice as good to the planet when I ride my bike instead of driving, so shouldn’t I be rewarded?