From the Canadian Department of Justice (handbook for police and prosecutors)
Criminal harassment can be conducted through the use of a computer system, including the Internet.10 Although this type of conduct is described in various ways, not all such conduct falls within Canadas definition of criminal harassment. For example, cyber-stalking or on-line harassment is often used to refer to (1) direct communication through e-mail; (2) Internet harassment, where the offender publishes offensive or threatening information about the victim on the Internet; and (3) unauthorized use, control or sabotage of the victims computer.11 In some cyber-stalking situations, criminal harassment charges may be appropriate; however, depending on the activity involved, charges under sections 342.1 (unauthorized use of a computer), 342.2 (possession of device to obtain computer service) and subsection 430(1.1) (mischief in relation to data) should also be considered. Activities that can be considered cyber-stalking can include delivering threatening or harassing messages through one or more of the following:
e-mail;
chat rooms;
message boards;
newsgroups; and
forums.
Other variations of cyber-stalking include the following:
sending inappropriate electronic greeting cards;
posting personal advertisements in the victims name;
creating Web sites that contain threatening or harassing messages or that contain provocative or pornographic photographs, most of which have been altered;
sending viruses to the victims computer;
using spy-ware to track Web site visits or record keystrokes the victim makes; and
sending harassing messages to the victims employers, co-workers, students, teachers, customers, friends, families or churches or sending harassing messages forged in the victims name to others.12