High volume bulk e-mail may result in liability for trespass. Many ISPs use filtering software which filters out commercial e-mail from known spammers. Several software programs also filter out spam. The September 1998 PC World reviews several of these programs, and finds serious flaws with most of them. Other Privacy Theories.
Government is limited by Fourth Amendment s prohibition of unreasonable search and seizure.
The type of information under consideration is important. While the Fourth Amendment protects the content of telephone conversations, it does not protect such things as telephone numbers called or the number of calls made. Intrusion into the individual s private affairs. Public disclosure of embarrassing private facts. Publicly placing an individual in a false light.