Canada's Globe and Mail reported today that "Edmonton-based blogger Dave Cournoyer pointed out on his blog Thursday night that the website stephenharper.com is actually a link to a portal for adult personals, replete with images of women clad in black lingerie and stiletto heels." *****[The Story seems to have been removed by the Glober now...weird...Maybe because it was inaccurate or for some other reason??]*****
Upon checking it on Friday morning however, I saw that it is currently just pointed to a standard PPC page. The story also points out that StephenHarper.org is a lampoon web site about the Canadian Prime Minister.
As a domain name dispute lawyer, I would say that the .org domain name is probably beyond the reach of Stephen Harper, assuming he would even be interested in going after it, since it is likely a non-commercial and fair use, e.g. for the purposes of review, critiscism, and commentary, as understood by the UDRP and by trademark law. The .com however, could theoretically be caught by the ICANN UDRP, if the PM brought a case to WIPO or the NAF, for example, if he was able to provide "trademark rights" in his name, and showed that the registrant had "no legitimate interest" in the domain name, and registered it and used it in "bad faith".
In this Jay Leno case reported by the Calgary Herald, one can see a summary of the WIPO's analysis of the UDRP provisions regarding personal names and common law trademark rights. The actual ICANN UDRP WIPO domain name dispute case can be read here.