I'll share my experience, too: I live near Glen Park and was in Bello that day, taking up one of those coveted seats, as all this was happening. I recall being aware of a lot of police cars outside, and perhaps seeing the phalanx around Ross as they walked past the window. Clearly something big was going on, but I stepped outside and the street was already back to normal. Shrug, perhaps I'll hear about it on the evening news. Not a peep. :-)
It was only some months & years later that I heard about Glen Park, the library, and Bello being part of the drama, and other local landmarks. To this day I keep hearing about other local details. (I learned a few months ago that his group house was on Monterey Blvd, not far from the conservatory).
Looking back, I had noticed a number of 'out-of-town' business people in Bello around that time. Glen Park is a busy local scene, but gets very few visitors, so they stuck out. Clean cut, business casual, but not FiDi types. They were cheerful but not interested in chatting. Who would go to a cafe and not want to socialize, I wondered? I thought perhaps realestate people.
I went to Bello frequently then, and must have seen Ross there a few times too, but I only vaguely recall once or twice. Something drew my attention to his laptop, maybe it had an EFF sticker on it? But he likewise didn't seem interested in conversation. I do recall once he was talking with an older man, in his 50's or early 60's, about libertarianism.