I took my two sons to San Francisco when they were 3 and 5. That's been nearly 25 years. Even then, homeless were on the streets. But, not everywhere. We were from a small town also, so as we walked to McDonald's I gave everyone we met some change. It wasn't long until I had run out of change. I can't imagine what it is like now. I see some things on the internet and you pretty much confirmed what I expected. Anyway, the memories you make with your son will last a lifetime. It might be hard to judge now, but when he is older, he will bring up this day and have some good stories. Thanks for sharing and I wish the best for you and your family.