I think there may be another explanation. Could be the dude was mentally disabled? Or just plain weird?
I'm around the Gay Area, and, I haven't been stalked like that.
However, in my read, my first reaction was mentally challenged, maybe because I've been around special ed for awhile. Santa Cruz had a number of section 8 folks that appeared normal, but, as you got to know them, it became apparent they were a bit weird.
One guy, big, tall, dressed in a tux, would come into our restaurant, and, until about the 3rd time, appeared normal. After that, he would come over to the house I was staying in, and sing outside the window at 3-6am. He had a crush on the landlord, someone that had also appeared normal, at first, but, turned out to be section 8 as well.
Had to move, quickly. She was female, and, when I moved out, assaulted, and battered me, as I took my furniture out of the house. Since I'd been there for a month, it was now her's.
She actually tried to claw my eyes out, with rather long nails...
There are some pretty crazy folks that are out in the normal population, and, supported by the government.
Of course there is no reason someone mentally challenged can't be happy
as well...
Finally, there are a number of folks that are homeless, some neat, some not so neat, that will stalk you, try and get you isolated, and extort, or force you to give them money. This has happened to my girlfriend, in San Francisco. I guess she reacted in a way the guy didn't like, all 5' and 105 pounds, and the guy punched her in the face, for no reason. I'd REALLY have liked to have been there for that one...
Having worked in the SFDA's office, about 40% of the cases investigated are homeless crime, usually on each other for territory, sometimes against a normal person, for money. They never go to trial, and, the people stay on the street, because homeless people do not make credible witnesses, and, they won't testify, about 100% of the time, since they have a great fear of police, DA's, and the legal system.