So now being an ass is illegal?

Nebraska case over email

I am somewhat curious...how in the hell did this become a court case to begin with? It would seem appropriate to file for some sort of active restraining order if someone is being deliberately insulting or consists in their behavior as harassment and that violating that would constitute some sort of police or judicial response. It does not seem appropriate to decide that such actions as sending offensive or harassing email constitutes any of the provisions for unprotected free speech. It is not anything like libel or yelling fire in a crowded theater.