Thanks for reporting. I, too, do not have a problem with homeless people in our park, and there may not be crime or violence, but there most certainly is drug use. Hypodermic needles are not uncommon to find in cleanups. And the outbreak of Hep A in homeless areas is further concerning. If this were an open field or an urban setting, that's one thing. But in the vicinity of playgrounds is a whole different concern.
I suggest you take pictures and send them to the City as we have done with our local park, where a full on tent encampment is literally feet away from the play structure and sand area.