This literally happened to me last week in Fresno, CA at @dmpayton's house. Fortunately, it's not possible to directly call CPS here; one needs to go through the police first. The police arrived and questioned me. I explained to them that I had no intention of changing my behavior and that I didn't want to answer any questions. They were polite and eventually left.

But it was still bizarre. I don't understand why the response (to the caller) isn't, "M'am, there's no violation of the law in your description of this event. Please keep this line open in case of actual emergencies."