17. The difficulty of policing an electronic border may have something to do with its relative length. See comment of Prof. Peter Martin, NewJuris Electronic Conference (Sept. 22, 1993) at p. 13 (discussing cyberspace's "near infinite boundary" with territorial jurisdictions). Physical roads and ports linking sovereign territories are few in number, and geographical boundaries can be fenced and policed. In contrast, the number of starting points for an electronic "trip" out of a given country is staggering, consisting of every telephone capable of connecting outside the territory. Even if electronic communications are concentrated into high volume connections, a customs house opened on an electronic border would cause a massive traffic jam, threatening the very electronic commerce such facilities were constructed to encourage.