If you are interested in reading about laws dealing with Halloween-related matters, check out this post from Et Seq., the Harvard Law School Library Blog – http://etseq.law.harvard.edu/2012/10/halloween-and-the-law-a-round-up-of-links/. You will find links to actual, current laws in the United States, such as the laws dealing with the paranormal in Massachusetts. For example, did you know that sellers and brokers are not mandated to disclose to buyers or tenants regarding the perceived taint of a paranormal phenomena? (See the General Laws of the Commonwealth of Massachusetts.)
Do you know of a current Maryland law on the paranormal? If so, please leave a comment below!