I think that if a parent or guardian was thinking about whether to refuse to provide for his or her child, this would <sarcasm>definitely</sarcasm> be a disincentive. I mean, $100? That’s definitely more than buying food and clothes for a kid.
§ 22-1102. Refusal or neglect of guardian to provide for child under 14 years of age
Any person within the District of Columbia, of sufficient financial ability, who shall refuse or neglect to provide for any child under the age of 14 years, of which he or she shall be the parent or guardian, such food, clothing, and shelter as will prevent the suffering and secure the safety of such child, shall be deemed guilty of a misdemeanor, and upon conviction thereof shall be subject to punishment by a fine of not more than $ 100, or by imprisonment in the Workhouse of the District of Columbia for not more than 3 months, or both such fine and imprisonment.