OK Felix, riddle me this.
If Margaret was aware that Samantha, a person she has previously engaged with in a way she knows or ought to know Samantha found upsetting on at least one occasion, was present in the place where the sticker was, and intended to engage with her in such a way again (making two incidents which taken together could constitute harassment)...
...why did she choose to harass Samantha by photographing a sticker?
Isn't that a bit...weird? And random?
How many people think, "Oh look, there's that person I don't like, I know, I'll photograph this sticker! That will really upset them! Hahaha!"
Wouldn't Margaret, I don't know, turn to Samantha, point at the sticker and say, "This means people like you need to keep out of women's spaces" or something a bit more obvious than that?
Because as I have pointed out to you several times now, harassment is behaviour which a reasonable person would consider to be such.
How many reasonable people would consider photographing a sticker in a public place to be harassment?
Now please stop with the "you have no idea how much harassment can affect someone's life". I do, in fact, having been the victim of harassment which I did not even report to the police because, frankly, why bother?
I should not have to explain to a police officer what harassment is and what it is not. You should know. And you do know. You're just trying to blind the general public with science to justify why your colleagues are investigatng thought crimes instead of real crimes. Unfortunately for you, this member of the public is a lawyer, and not impressed.