I did miss that second post where the OP asserted what he believed was a trespass. Assuming it is true, it is still a bit hard to prove and doesn't take away from the fact the photog owns the image. It could possibly inflame the situation also. Pros and cons to everything.
I get your meaning about "the way it's done on the street". I also get that being a "difficult" target also has its merits. I, on occasion, myself have engaged in unorthodox and unconventional (but entirely legal) strategies to create favorable outcomes for myself but I try to use precise language and qualify what I say so that people don't misinterpret my statements as something THEY should blindly follow and do.
If one wants to discuss such unconventional tactics responsibly, I recommend using more thought and careful language vs. overly blunt, simplistic, "blurty" language on a consistent basis. I am certainly not a prude by far (having used my share of street language as well) but at the same time (as community host) I am not trying to cultivate an entire community of "brutish, thuggish" street posts either.
I am a big believer in allowing maximum latitude for people to post freely but if recklessness is going to be the norm, I am not (nor others on ELI are) going to want to keep "cleaning up" after such comments.
You been here on ELI long enough. You know what goes on here. You know the program. I think you are a smart person. I think you know what is appropriate and responsible and what is not. It is time to switch channels starting now. Okay? I hope you get my meaning.
If it is unclear, then I can just resolve the entire issue myself unilaterally. Let's all get on the same page, shall we?
The OP said the photographer climbed fences and snuck past alarms. I don't think there's any way the dickhead photographer was there legally. So he should be called out. And punished for his holier than you stance with his stupid photo.
My strategy is to be such a thorny dick that nobody will want to mess with sending another stupid letter. There's the legal way to do things and the way it's done on the street.