Knowing his or her victims are unable to identify the source of the harassment or threats makes the cyberstalker bolder, encouraging him or her to continue the harassment.
This makes many perpetrators more willing to continue pursuing the victim not only at work, but at home, with all the information in the world about the target.
Another recent incident demonstrates how the lack of law enforcement training and expertise can frustrate cyberstalking victims.
A woman complained to a local police agency that a man had posted information on the web claiming that her nine-year-old daughter was available for sex.
Other things that pave the way for a cyberstalker are the often anonymous character of the Internet, and the practiced use of non-confrontational and impersonal communications.
A potential stalker may be unwilling or unable to confront a victim in person or over the telephone, but he or she may have little hesitation about sending the victim harassing or threatening electronic communications.
This is the type of information that can easily get someone killed, as happened to Amy Boyer, whose shooter purchased her Social Security number from the Docusearch site.
Another complication for law enforcement is the presence of services that provide anonymous communications over the Internet.
A cyberstalker's true identity can be concealed by using different Internet service providers and by adopting different screen names.
More experienced stalkers can use anonymous remailers that make it all-but-impossible to determine the true identity of the source of an e-mail.
Finally, just as in physical stalking, online harassment and threats may be a prelude to physical violence or serious property damage.
In that sense, they must all be taken seriously on the first report by the victim.
Even so, too often online harassment escalates into real-life stalking, where its victims are largely female, and who occasionally become victims of homicide that started out as online "following" and badgering.