720 ILCS 5/21.1-2: Residential picketing.

A person commits residential picketing when he or she pickets before or about the residence or dwelling of any person, except when the residence or dwelling is used as a place of business. This Article does not apply to a person peacefully picketing his own residence or dwelling and does not prohibit the peaceful picketing of the place of holding a meeting or assembly on premises commonly used to discuss subjects of general public interest.