There are two parks we used to frequent when I lived there, one was the park that sits above Lopez Canyon which is on the south side of Calle Cristobal. The park is adjacent to condos that overlook Lopez Canyon. On the south side of Calle Crisobal there are other condos that overlook the Penasquitos preserve, (western end of it). Now about 2 miles to the east there is another park which is newer, I forgot the name but it is basically where Camino Ruiz turns into Calle Cristobal. I had seen times at night at the Lopez Canyon park where there were some pretty shady looking characters. They didn’t seem to be homeless to me, but more like your typical teens/twenty something hoods. Now one time I did get a call from my wife who was at the newer park and it was pretty empty and she called me because she saw a fairly large group of what she thought to be migrants or illegals jumping the fence to come into the park from the canyon.
That said, we lived there and never had any problems at all. If anything, I think the homeless would be aliens living in the canyons as opposed to the destitute homeless…