Knocking stones into a public park is prohibited.
Sec. 15-53. Throwing stones or other objects; engaging in dangerous games. No person shall knock or throw any stones or other missiles into or upon any public park or playground of the city or engage in any games or play likely to be dangerous to persons visiting therein. (Code 1966, § 20-8)
It is illegal to use profane language on a playground.
Sec. 15-52. Improper language or behavior. No person shall use any profane or indecent language or behave in an offensive manner in any public park or playground of the city or upon the sidewalks adjoining any public park or playground. (Code 1966, § 20-7)