This SO reminded me of my days in Dallas - lived in an apartment complex. Loved it there. I often miss the being with others, the coffee bar, although I sure as hell don't miss Texas. (Sorry, Texans. It's not YOU; it's just I'm a Californian thru and thru and I was so homesick)
Anyway, I was lucky; usually I could find a spot to write. But like you I rarely told people I was a writer.
I'd walk at night; we were gated so it was safe. I loved my nightwalks. One night, a security car showed up, stopped by me.
"Oh, it's you. We should have known," they laughed.
One of the residents had seen me walking and walking around the complex and called the cops!
I laughed so hard. So did the cops.