EmilGil, that sounds very fair. It wouldn't go down very well in the UK or US since we don't like logical laws.
Digital cameras just can't be stopped, they are hidden in plain sight that people go for the obvious targets now.
I've taken photo's in places that clearly state no-photography. I even filmed part of my short film for an art unit in a shopping complex. We got away with it for about 10 minutes and as we were chatting through a second scene the guards came over and told us to clear off. Of course, they didn't ask for the DV tape, and didn't ban us. A few months later I took photo's in there with a Fed, and no-one even noticed. Strange since if you sit on the floor they will move you along within 2 minutes (this is proven).
Funny thing is, that shopping place has a sign on each entrance, basically "no digital cameras or video-recording". It mentions nothing about film-cameras so I assume everything up to large format is fine with them.
I've always acted pig-ignorant, polite and a little cocky, and a little charm goes a long way.
I'm also a longboarder so I love the challenge of private property (such as car parks) and whether I can get away with using them. The Outlet Village in Swindon has huge outdoor parking, smooth tarmac. Myself and a friend were cruising along in the empty one of three. A security guard tried to come up to me, of course I wasn't looking at him and had my music in, so accidentally didn't stop. The friend, when approached, did his sweet talking. The security guards said that weekends are too busy, but daytime in the week is fine so we could skate then and wouldn't be hassled. (This is the same shopping complex that the first year photography students are taken to photograph the exterior architecture, without hassle)
The same thing happened in Malborough, we were skating in a car park, and the guy came over, asked me and the friend to leave, with a smile on my face in a friendly voice I said no, and to tell me what laws I was breaking. Course I really meant to banter, and would leave soon enough since he was polite about it. Because I challenged it, however, he told us that after 6pm we could come back and skate all we liked.
I guess you need ignorance, ignore any signs as you enter private property, do your thing and leave before they approach you. I was taking photo's once, and it was 'no trespassing'. I hopped a fence moments before the security got out their patrol car, they just reversed out once they saw I was leaving. No chase, no hassle.
A week later there were huge metal fences and wire all around the property 😀