See
http://www.criminaldefenselawyer.co.../the-disturbing-peace-penal-code-pennsylvania
Disorderly conduct - 18 Pa. Cons. Stat. § 5503
§ 5503. Disorderly conduct.
(a) Offense defined.--A person is guilty of disorderly
conduct if, with intent to cause public inconvenience, annoyance
or alarm, or recklessly creating a risk thereof, he:
(1) engages in fighting or threatening, or in violent or
tumultuous behavior;
(2) makes unreasonable noise;
(3) uses obscene language, or makes an obscene gesture;
or
(4) creates a hazardous or physically offensive
condition by any act which serves no legitimate purpose of
the actor.
(b) Grading.--An offense under this section is a misdemeanor
of the third degree if the intent of the actor is to cause
substantial harm or serious inconvenience, or if he persists in
disorderly conduct after reasonable warning or request to
desist. Otherwise disorderly conduct is a summary offense.
(c) Definition.--As used in this section the word "public"
means affecting or likely to affect persons in a place to which
the public or a substantial group has access; among the places
included are highways, transport facilities, schools, prisons,
apartment houses, places of business or amusement, any
neighborhood, or any premises which are open to the public.