I never felt my safety threatened. However, I try to be a little more cautious when I have my children present. We were snooping through the nooks and crannies of the park when I turned a corner and was face to face with someone that was camping and in the act of administering drugs or insulin. I'm not sure I would know the difference.
However, overall the park was plenty friendly and safe feeling. It was almost natural feeling in a very built sense. Plant material and water capture the spirit of nature. The concrete mountain stream was a piece of art framed within nature and hovering over a freeway. I'm glad I went.
The kids give a little sense of the scale. It was amazing where the kids could actually climb unrestricted. They could jump up on walls that had huge drops on the other side.
I see these rock doves nesting and I remember my lectures in Architecture History. Prof. Weinel liked to remind us that there were many more users than just humans.