As far as I can tell, this is the state's most recent iteration of its computer policy (2008). Its here: http://www2.illinois.gov/bccs/Documents/Policies/GeneralIT.pdf
A look at that policy reveals that the activities enumerated under prohibited actions include: "Libelous, slanderous, degrading, insulting, vulgar, obscene, offensive, or hostile remarks, and/or emails, and/or websites." Obviously, this has some problems since I'm not sure how we would define things like degrading or offensive remarks (not to mention vulgar or obscene), but it seems far more specific than “Electronic mail and all other electronic communication (including websites and blog posts) should adhere to the University standards of conduct which prohibits any communication which tends to embarrass, humiliate or shed a negative light on any member of the community. Respect others you contact electronically by avoiding distasteful, inflammatory, harassing or otherwise unacceptable comments." As has been pointed out repeatedly, these definitions are so vague that they could encompass almost anything.