In Illinois it is, apparently, incredibly vague: http://www.ilga.gov/legislation/ilcs/fulltext.asp?DocName=072000050K26-1 http://www.ilga.gov/legislation/ilcs/

In Illinois it is, apparently, incredibly vague: http://www.ilga.gov/legislation/ilcs/fulltext.asp?DocName=072000050K26-1 http://www.ilga.gov/legislation/ilcs/fulltext.asp?DocName=07... a) A person commits disorderly conduct when he knowingly: (1) Does any act in such unreasonable manner as to alarm or disturb another and to provoke a breach of the peace