public statute, or by case law, to be a nuisance per se. There are few state or federal statutes or case law declaring actions or structures to be a nuisance in and of themselves. Few activities or structures, in and of themselves and under any and all circumstances, are a nuisance; which is how courts determine whether or not an action or structure is a nuisance per se. Over the last 1000 years, public nuisance has been used by governmental authorities to stop conduct that was considered quasi-criminal because, although not strictly illegal, it was deemed unreasonable in view of its likelihood to injure someone in the general public. Donald Gifford argues that civil liability has always been an "incidental aspect of public nuisance". Traditionally, actionable conduct involved the blocking of a public roadway, the dumping of sewage into a public river or the blasting of a stereo in a public park. To stop this type of conduct, governments sought injunctions either enjoining the activity that caused the nuisance or requiring the responsible party to abate the nuisance. In recent decades, however, governments blurred the lines between public and private nuisance causes of action. William Prosser noted this in 1966 and warned courts and scholars against confusing and merging the substantive laws of the two torts. In some states, his warning went unheeded and some courts and legislatures have created vague and ill-defined definitions to describe what constitutes a public nuisance. For example, Florida's Supreme Court has held that a public nuisance is any thing that causes "annoyance to the community or harm to public health." A contemporary example of a nuisance law in the United States is the Article 40 Bylaw of Amherst, Massachusetts known as the Nuisance House Bylaw. The law is voted on by members of the town at town meetings. The stated purpose of such a law is "In accordance with the Town of Amherst’s Home Rule Authority, and to protect the health, safety, and welfare of the inhabitants of the Town, this bylaw shall permit the Town to impose liability on owners and other responsible persons for the nuisances and harm caused by loud and unruly gatherings on private property and shall discourage the consumption of alcoholic beverages by underage persons at such gatherings." In practice, the law works so that if one member of the neighborhood feels that there is a neighbor's noise level