Oh yeah I set up base camp for a filmed robotics publicity student in a garage once and they got angry.
Film crews in LA are renting the lots for their production, not taking a ticket as if they are parking as a regular customer. I’m sure the garage would have been accommodating if you had asked to use the space.
Yeah, it's a different contract for film crews. I worked in DTLA for a few years and when you go to a lot or building that has been rented, there is always a bill posted on all entrances letting you know you may be filmed. I believe it's a permit given by the city.
You can't just start filming or setting up without going through the proper channels.