I've never done it as I always park in the parking lot.
But what I have seen is more and more bikes parking on the sidewalk, usually in a plaza or something of the sort where there are large sidewalks.
Without going into the legalities of it all, is this slowly turning into an appropriate thing to do?
If given the opportunity to park on the sidewalk, would you do it if there is ample amounts of room and it's out of the way of foot traffic?