from the PA Crimes Code...
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2709.  Harassment

     A person commits a summary offense when, with intent to
harass, annoy, or alarm another person:

     (1)  he strikes, shoves, kicks, or otherwise subjects him
to physical contact, or attempt or threatens to do the same; or

     (2)  he follows a person in or about a public place or places; 
or

     (3)  he engages in a course of conduct or repeatedly commits 
acts which alarm or seriously annoy such other person and which
serve no legitimate purpose.
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